psychology is a long tough row to hoe. plan on a Phd and lotsa student loans. the human services field is needing Phd level folks less and less, so plan on an academic or research career if go choose psychology. on the other hand, in private practice you can earn a decent living, but then plan on working nights for quite awhile till you get it off the ground.
some people do fantastic in the arts, but they are notoriously low paying, unstable, and hard to predict for the majority of people. so i guess it depends on your realistic assessment of your level of talent and whether people will be willing to pay money for what you produce. i love the arts, but a lot of people see it as extra.
psychology is seen as an extra, too. i truly do not believe it is, but really it's business that runs everything. concrete production, buying, and selling.
but you know you have to follow your heart and your dreams. but, also, ask yourself a simple question: what can i stand to do all day? what thing is going to motivate me day after day and what thing is more of a passing interest?