Let's see. First was the realization that it's not reasonable to try and make a living from music. I thought about studying classical guitar but I wasn't too keen about focusing on dead music and job opportunies for classical guitarists are a dime in a dozen unless you're among the top 10 of the world. So I went to university to study maths. Not because I was interested but because I was good at it in school. It took me quite a while to accept that it's too hard to study something when you're not really interested. So I dropped out of that and went the road of least resistance becoming a physics technician. Not that this really interests me but it was less demanding and I was able to get a job in the industry.
So now I'm testing laser systems for industrial applications having a low but steady income and wait for the weekends to get back to my music.
Not very helpful I guess.
I would suppose that you make a list of all the things you are interested in and the do some research about the effort and costs to make that a profession and compare that to the chances of actually getting a job later.
This is not meant to discourage you from finding your dream job. Of course you can go for something with little demand as long as you really want to do that, but be aware that you can only succeed if you give it 110%.

Marcel