Endless repetition. Loop vs chop return, forehand and backhand, plus topspin lifting the short push return if you’re an attacking player. The game is more about muscle memory than pretty much everything else due to the sheer pace of the rally.
Good anticipation and footwork will vastly improve your forehand.
Working hard on your serve – novices lose matches because their serve isn’t tight enough. Also, at lower levels you tend to win by not making a mistake, so patience rather than all out attack.
Reading spin gets much easier once you learn what to look out for – it gets instinctive.
Plus tight shorts which say Butterfly on them, and endless discussion of rubber compounds on table tennis forums.