Or by doing your own research. Feed your own games or master games through an engine and make detailed explorations of how tactical and positional decisions affect the structure of games. You use the engine because that's the easiest way to check for tactical shots. It's a long, hard process which could turn you into a brilliant player.
Better to find the tactical shots without an engine, then use the engine to check your accuracy.
Good Positional Chess, Planning & Strategy Books for Beginners and Beyond...
https://www.chess.com/blog/RussBell/introduction-to-positional-chess-planning-strategy