@donostrilssmell I am still not sure I get you. As a beginner I might be wasting a lot of time calculating pointless lines but I guess it is something I have to do to get better and not do it as I improve.
If you mean what @stiggling said, then it makes sense. Trying to brute force through all positions is not possible. What I have been doing so far is looking out for certain things that might indicate the presence of a tactic, such as an open king or overworked pieces, pins, and critical squares. In such cases I spend quite a bit of time calculating as much as possible. Otherwise I just play the move that looks logical and is not terrible strategically (like blocking an undeveloped piece)



study is 10x overrated play play play play play play pl7y
Back to Basics: Tactics by Dan Heisman (2007)
I'd start with that book for tactics rather than on-line tactics trainers or the Polgar book. Keep going through it until you can solve all of the problems more or less instantly.
Started with it and about a sixth of the way through. Nothing very interesting so far. But I do like that there is quite a bit of text rather than just diagrams as is the case with the Polgar book