...such as how much job security is there?
None whatsoever **unless** you create a portfolio for yourself & manage to gain HUGE experience through working hard and steady for anyone fair enough to recognize how invaluable your talent is by proofs.
Never settle for anything else but YOUR dream and your own goals; rack up as much skills as you can, offer them, cash in and never look back.
Cuz, an artist needs recognition as soon as s/he signs a canvas while producing extraordinarily original material(s) in ANY mediums with ANY tools mastered.
Forget job security, you'll simply become a drawing machine (etc) and be your own boss not by carreer hopes but by choice.
In fact, you should already know that the multi_tasking stuff has begun.