I’m personally a mix of not-that-natural athlete and learner, and an addict of getting into things and self-learning. Imagine where this can get me... What I experienced multiple times was ingraining flawed mechanics pursuing good things. It’s not even a case of focusing on wrong/minute details but rather not doing what I feel I try to do. Only understood after video review. Multiple times I’ve heard things like “you are okaish, just practice more”, but it appeared I wasn’t - practice or matchplay didn’t get me to where I aimed, or at least just a complete (for the level) player with no major holes.
Now with more experience, after not only reading, whatching, understanding and trying things, getting ideas and cues from coaches, but also reviewing a lot with video in terms of both strokes form and produced shots, after figuring out keys and triggers which work for me, I think I now can go with feel to some extent. Until I get another video review...
What I’m trying to say

one can certainly figure out how to play tennis just playing and practicing. Even better with some good basic info. But it’s extremely likely that the outcome would be a homebrew tennis player, with at least number of imperfect features in his/her game, mostly concentrated in technics area.
A more interesting question I see how far one can go with no major coaching, with all the high quality info available today (even though you need to sort it from misleading stuff), dedicated practice and self/peer analysis. Trying to figure out myself