The first thing I'd recommend is constantly evaluating positions from a strategic POV ("Evaluate like a GM" is a good book, alternatively look at a lot of positions and evaluate like you were an engine and then engine check).
Second (or first if you lack even the basics to do said evaluation) is understand strategic concepts. A good starting point would be "Simple Chess" the next step would be pawn structures ("Power of Pawns" -> "Chess Structures" would be my recommendations, the latter is probably the greatest chess book in recent times imo). There's also many Chessable courses, I'm quite fond of "Developing Chess Intuition" by GM Raven Sturt and the "Art of..." series by CM Can Kabadayi for lower rated players. The sky is the limit, there's good books all the way up, for example "Mastering Chess Strategy" usually recommended for 2000+ ELO
Third study great positional players like Carlsen, Karpov, Petrosian etc.
I'd say the most important thing to realize is that just like tactics puzzles, there's strategic puzzles but they are not as obvious.
