I'm going to be totally honest with you I really think you need to go back to fundamentals and also I suggest try doing some drawings on paper or with non digital media it could help with your line work, I know I'm a lot more comfortable drawing on paper than on my drawing tablet. I also suggest drawing and studying still life's and a bit less on anatomy for now. You could set up just a bunch of random objects and draw with pencil. I would also love to see some of your own work its a good break from all the studies and gives a good read on where are are as an artist. I dont want you to take this the wrong way and I really love how consistent you are, but you need to go back and learn the basics before moving to the advance stuff. and also have some fun with it studying everyday can wear you out trust me.
