Darts (Douglas)- Art School Journey

Hi!
My name is Douglas Sales, from Brazil. I have started the course some time ago but didn't get far. I'm going slowly but steady this time.
I have been learning to draw in completly isolation for quite some time, and have been feeling down because i'm not seeing too much improvement. I've decided to follow the many advices i heard to get involved in a community and get critique.
I don't really have a goal with art today, so i'm experimenting a lot of stuff.
Lately i've been learning about 3d Sculpting, Visual Effects, Animation and traditional drawing.
I'm posting some of the drawings that i'm most proud of.
I've drawn the toad from observation (photo), the others are original characters.

I'm taking the course in order, currently making term 1 Nude Figure Drawing assignments and gonna post them soon.
Any advice/suggestion/critique are welcome, including in my rusty English! Haha

Pen Control Assignment



Image Adjustments



Nude Figure Drawing
Skeleton Practice



Proportions (Watching and Drawing)



(From Memory)