OP you present many complications that have been compounded by the pressures of student loans, living at home, and being unsure of career direction.
The procrastination is in part due to your un-sureness of career. Your anxiety, depression, other medical concerns, and factors around you are making things quite difficult for you.
You have stated you can do the nursing academic work and like your PCA work. You do have to fix yourself enough to be able to earn a living to pay off your student loans and move on with life. Like yourself on the inside; make yourself strong. You are smart but you need to approach this and figure out - how to cope and deal with your situation. You may need some meds with talk therapy, but do not keep jumping around without being introspective.
You can always develop your art and do your art ‘on the side’ and perhaps at some point in your life you perhaps can make that more of your lively-hood.
Nursing has a lot of areas - you may find you enjoy some areas (that may be lower stress for you) than others.
If you like nursing, finish that degree ASAP - once you are well enough.
Just be aware that with a nursing degree, you cannot have problems with alcohol or illegal drugs. You have to certify with nursing license renewal. You do not want to get the degree and then shoot yourself in the foot where you cannot use your degree.
I am a RN (also have UG in psych) and I have a DD graduating soon as a RN. Have worked in 3 different states, and have worked a fair amount in psych. Have relatives that have/had major issues including depression and anxiety disorder.
Art therapy is a good suggestion, but you have to get the student loans paid off as soon as you are earning significant money - the interest compounding with dragged out loans will be even more of a nightmare.
Also on free time, find things that you enjoy that are low cost. Enjoy parks, free art exhibits, etc.
All of us have some family baggage - it is what it is. You need to find a way for YOU to be happy and functioning.
You are dealing with the external things, but have internal feelings that you do need to deal with.
Not sending a PM because others may offer some additional insight based on my comments.