Great work on the drawings halfloaf! I've been recently getting back into drawing/sketching after losing confidence/motivation several years ago. I decided that this is a skill verging on necessary for me, and warrants the time spent to learn.

I haven't been to a life drawing session (yet) but looks really useful. One thing that has been working well for me in the past is to find an interesting photo (of an animal perhaps) on google images (licensed as reproduce with modification) and try to recreate the photo with pencil and paper. I've found it a rewarding exercise, and produces much better results than when I try to pull something out of my mind's eye. I realize I'm not making anything "new" but it's purely for the learning and the training of my hand, eyes and brain.