I’d be more than happy to offer any advice I can!
Hi there, thanks very much for your question!
Like you, I am mostly self-taught. Where I am now —artistically speaking— is thanks to a mix of years of practice and having the wealth of the Internet at my fingertips.
Seriously, I wouldn’t be where I am now as an artist if it wasn’t for spending some exciting years on a (sadly defunct) web forum where I was exposed to the work of some highly talented artists, many of whom have gone on to work in various parts of the creative industry. Not only was I able to feed off the collective creative energy such a forum granted me, I also learned a very important thing: getting constructive critiques from others is an incredibly important part of being an artist.
Who knows where I’d be or what I’d be doing if I never joined that forum…
Anyways, I digress.
Going back to your question: first off, yes, I think you should definitely take some form of life/figure drawing class. Studying how to draw the human figure is both exciting and absolutely essential. You’ll be amazed how much your skills will grow if you make studying and drawing the human form a part of a regular routine.
Secondly, I can’t say I’ve learned anything too illuminating from the few courses I’ve done that I couldn’t learn from books or from other artists. However, one valuable thing I learned was to loosen up…to not be afraid of putting pencil to paper; to make mistakes. Making mistakes is frustrating, sure, but it can also be one of the most wonderful parts of the artistic process, as you will sometimes happen upon ‘happy mistakes,’ which may lead to you learning a new skill or technique.
Basically, keep doing what you’re doing, so long as you’re doing everything you can to grow as an artist. Maybe the professors you’ve had so far don’t connect with you, but there are some fantastic teachers out there, so don’t let the few you’ve experienced paint all the others with the same brush.
Anyhoo, I wish you the very best of luck!