I'm already in a creative field: web programming. I create websites for people. I'm not the graphic designer, I'm the coder. It's like solving puzzles all the time. I also play a fiddle in a jam session. I'm terrible at it but I have a gig today and sometimes I even get paid, but not today. I also have written self-published books, I have a blog I don't update very often but people thank me for my writing all the time, so I'm actually a writer (which is what I thought I was going to be when I was in 2nd grade.) I've altered clothing and sewed backpacking gear. I make shoes and sandals. I cook pretty well even though what I cook is simple. I hike and while that may not sound creative I wrote my books about my hiking and in one of them I wrote that if what you do is your art then hiking is my art. All artists must make sure not to sell too much of their time to others. You must keep some for your art.
There are many avenues for creativity even in regular workaday life.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.