You need software for this.

I know that PKJ can solve many problems.
But first and foremost i am looking to think and solve some situations myself and when cannot then turn to AI

Hi. I assume you want an ability for yourself like the PPT or other program has. You type a range and it says lets say 43%. I think thats basicly impossible if you are not rainman :D
What you can do (or this is what i do at least) is that say u have AA with NFD on 952ss. Opponent raises u. Its enough to know that your equity is crushing him (80+) ahead (around 65%) , flipping (around 50), behind (35) or crushed (<20) against the different possible holdings (his range)
You will never be able to say that u have 58%against his ENTIRE range, As the holdings freqency plays also a role that u can only estimate. So in this spot he can have
2p (flipping)
smaller pair with flushdraw (way ahead)
Set (behind but not a disaster)
Now u simply estimate that he will have less sets than pair+fd so it is profitable. If the board is QK5ss instead , you count with sets more likely and u decide upon spr (potodds)