are you noticing patterns in the clues themselves or mostly just getting stuck on vocabulary? practice absolutely matters, but the real jump comes when you start recognizing how constructors think - wordplay clues, misdirection, and common crossword answers that don't show up in regular conversation (like ETAS, ALOE, ERNE). reading the clues more carefully than you think you need to helps tons; that tricky wednesday clue is usually tricky because you're reading it wrong, not because the answer is obscure. i'd say stick with the nyt app since their difficulty curve is pretty solid, and when you get stuck, look at the answer and really understand why it works - that's where the learning happens, not just grinding through easier puzzles.