Sounds like you’re basically doing the right things. Note that focusing on quantity rather than quality is a choice, not a mistake. iNat needs lots of observations. As long as the photos are identifiable and have accurate dates and locations, they’re fine. You may want to post better photos and that’s great, but it’s not necessary.
I don’t know about others, but my learning to ID better comes bits at a time. You know about the Taraxacum problem now. (You probably also know that its taxonomic confusion is so great it hardly matters how we label them.) You’ll learn more, if you pay attention to the comments. Keep going and try not to repeat mistakes too often.
I say that as a person who makes lots of mistakes of every kind and who posts lots of poor photos (but some good ones, too, I hope).