In August I get a nice little bonus every year based on our companyies produxtion. Nothing, Probably between $900 and $2000. So I have started to look into building a new PC since my current one is a bit dated(2009).
I have never build a PC before but was wondering what is the best way to “future” proof a build?
Congrats on the arrival and swift departure of those funds 
I’ve always liked the site ‘Logical Increments’ as a ball-park money = PC guide. You’ll get what it does once you see it, but it offers a decent ‘swim-lane’ set of guidance and is often updated:
Others that are good for parts picking are:
and
With http://pcpartpicker.com/ being useful to view other people’s builds and use their rating system.
Unless you are doing overclocking that needs watercooling, building is pretty simple - once the right set of parts are chosen to fit together it is pretty similar to lego - just press together till it clicks. 
Future-proofing is often a case of picking the newest releases hardware to try to be on the good side of the obsolescence curve. Motherboards change each chip generation, memory bandwidth/speeds continue to change and graphics cards always have the newest/best sharp curve of prices, with something better always coming in 6 months. If you build a top-end then you’ll be ahead of the game for most games regardless, as desktop PC’s have actually slowed a bit in terms of new bits churn - the market sort of flattened a bit in 2015.
Tom’s Hardware is my go-to spot for understanding current generation PC technologies. They have a "Best of " series that is usually updated quarterly, if not monthly, and they group items into nice categories like “entry level”, “best value”, “highest performer”, etc. The review actually goes over the pros and cons of the devices, which helps personalize your choices.
Whether or not I pick directly from their list of recommendations, the additional information really helps me understand the hardware better, and helps me compare them for myself.
e.g. The Best CPU for Gaming in 2022 - Top Gaming CPUs for the Money | Tom's Hardware
Everybody’s got their opinions and some may differ with what I say so take it with a grain of salt. That being said, these are some things I learned along the way doing a couple PC builds:
Don’t skimp for quality on some of little details. Get a good, quality, full-size tower. Don’t go for mid unless it’s absolutely necessary for space reasons. I found myself quickly running out of internal space on my first build in a mid-tower, especially with how big graphics cards have become.
Get a good power supply. There are some different calculators out there but for a basic gaming PC, 700-750 should cover just about everything you throw at it. I just replaced mine but it ran solid through both my builds, lasting for over eight years.
For your heatsink on your CPU, make sure it has metal screws and not the cheap plastic tabs. You’ll save yourself potentially hours of frustration. Something like this would do just fine: http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099
Anyways, just my $.02.
I have to say i use tomshardware as well. Every year they do a great bang for buck computer comparison of different price ranges. They usually have at least two different knowledgeable people look for the best priced hardware in that price bracket and then the finished pc’s are fully tested and benchmarked.
In fact my current comp was based off of their winner computer specs for my desired price range and i have to say its still giving great performance for almost 2year old beast and has no troubles playing latest games at high or ultra settings very well.
Ok i “frankensteined” (is that a word) some old computer bits like case, keyboard and other small bits, but the core mobo+gfx card+cpu+power supply combo has and is working great for a good price.
I would without a heartbeat go to tomshardware for any future upgrade (provided they provide the same detailed info)
There are certainly a lot more things to consider like socket format and mobo architecture, but all things being equal it has been my experience that sims/games tend to be more GPU than CPU dependant. Not compromising on graphics adapter has made my systems feel newer longer.
The best future proofing you can do on a new PC build (IMHO) is a good quality case and PSU, these are a good solid foundation that can last several upgrades with different series of motherboard, CPU sockets, RAM … and we all like to upgrade our graphic cards often, don’t we … I know I do
But yeah, a good quality PSU is a must, do research here, some can blow and the poor quality ones can take out a lot of components when they do, seen it happen. It does not need to be a high wattage one as mentioned, 750W would be fine for a single modern graphic card, probably two.
In my two sort of high end PC’s, the older one uses a Corsair HX1000 that must be past its 5 year warranty now? (Oh yeah, look for a good warranty if you can) and I should probably replace it as a matter of insurance, the newer PC has Super Flower 1000W unit and its been in use for over a year, both great PSU’s that I spent a bit of time on researching.
I like good peripherals too like Keyboards and Mice, but as for graphic cards and CPU’s, these tend to change every year if you want to stay on top with some new revisions expected soon for those.
As regards motherboards, had some terrible bad luck with ASUS high end motherboards in last two builds, I know they are popular, but if something goes wrong Asus do not want to know, at least so in Europe, I’m not going to use Asus motherboards again (probably ) Pretty much tried most brands, inc Gigabyte, Abit (<-- sadly no more) currently a fan of high end MSI motherboards, they do everything the flashy Asus bling boards can do and have been perfectly stable for me too, easy to flash the BIOS via the different methods and the USB reliability for a lot of Flight sim accessories just works out of the box, rock solid stable unlike Asus for me, talking 12 Saitek FIP’s here and several of their panels as well as TPM, Yoke, Rudder pedals and TM Warthog.