"A jack of all trades is a master of none, but is often better than master of one."
I have often been called a renaissance man. I do have a lot of interests and have many different skills. I have joked, why should I buy for something or hire help when I can spend triple the time and money learning to do it myself! I believe anyone with curiosity of how things work and are built can relate. When I'm asked how I can do x or y, the best answer I can give is that I'm not afraid to try. In my opinion, what keeps most people from trying something new is a fear of failure. We put unrealistic expectations on ourselves to get it right from the start, and although we logically understand people who excel at their job, craft, art, sport, etc. have put in years of training and practice, we still can be deeply effected by the results of our first attempts.
If I were to make decisions about what I'm capable of based on the first website I built, the first loaf of bread baked, the first pot thrown, the first run I went on....I would not be where I am today. I have "failed" more times than I have succeeded, and I'm sure when you look back on what you are passionate about, you can see the same.
So the point of this is I don't necessarily identify as a "jack of all trades" or a "renaissance man." I'm just a person not afraid to experiment and learn new things. Next time you say to yourself "I can't do x," ask yourself if you truly can't or if you are just afraid to try.