So we have the first step toward happy artisthood which is Right View, there’s stress, it’s caused by clinging to things, it’s possible to end it, to do that there is a path to follow. Understanding that all your actions create stress is kamma. Get that basic idea in your head.
So how do you practice this, lot’s of life drawing, certainly not now. Maybe copy lots of artists that are more successful then you. Not going solve the stress involved in being an artist. The stress is all in how you act, thinking is indeed an action you can take. Try and let go of all the stress about deadlines, “Why doesn’t anyone love my art or me? will I ever think this is any good” Just focus on what you are doing.
Making art is complicated and you need to start with something really simple. Famed art teacher Joseph Albers started his classes with drawing straight lines. To get to happy artist-hood start with something even simpler. Take a breath.
Sit on your butt and pay attention to your breath, it’s easy and all the same issues that come up when you draw will come up when you breathe too. When breathing you can practice letting go of all the issues.
Now I could probably go on and on about this or I can point you to the best most basic manual on meditation it’s free, given away on the internet intentionally. Take five minutes a day and breathe, five minutes to read the book and fine tune what your doing. It’s made me a happier artist.