To go follow a little bit different train of thought--what does the
question, "Could I make a career of my music?" mean? Do you mean as a composer/songwriter? Do you mean as a recording artist? Do you mean as a performer?

And, of course, what do you mean by a career? Do you simply want to earn money from what you do? Do you want to support yourself(and family, if any), exclusive of any other work or income? You you want to achieve what would regarded as success in the music/entertainment industry?

The answers will vary based on how you choose to define the question. The real truth though, is that the answer to this question will not come from any of us--it will come from you--