You have to think of your career the way you look at the ocean, deciding which wave you're gonna take and which waves you're not gonna take. Some of the waves are going to be big, some are gonna be small, sometimes the sea is going to be calm. Your career is not going to be one steady march upward to glory.
I don't believe there's anything in life you can't go back and fix. The ancient Vedas - the oldest Hindu philosophy - and modern science agree that time is an illusion. If that's true, there's no such thing as a past or a future - it's all one huge now. So what you fix now affects the past and the future.
I had to jump around in the arts for a while just to survive. I earned a little money here and there, playing the guitar at union meetings, functions. I sold some science-fiction stories. I knew there was absolutely no question of me not being connected with the arts, but I couldn't find any acting jobs.