The first square you open is guaranteed to be safe, and (by default) you are guaranteed to be able to solve the whole grid by deduction rather than guesswork. (Deductions may require you to think about the total number of mines.)
Maybe it’s the total number of mines that we’re missing? IDK I’m not that great at math/logic puzzles, my superpower is reading documentation
This is my train of thought approaching this problem:
There must be an empty cell above the 5 or 3 because if they were both mines then there would have to be a space above the left hand 2, a mine above the right hand 2, and a mine above the left hand 1, thus putting 2 mines next to that 1 which is not possible.
As there must be a space above the 5 or 3 then there must be a mine above the left hand 2 to satisfy the 3, so I would mark that cell.
There must be a mine and space above the right hand 2 and left hand 1 to satisfy the 2’s, so the cell above the right hand 1 must be empty to satisfy the left hand 1. So I would click on this cell next.