I was about 13 at the time and on a family vacation. My parents were in a store shopping and I was bored so I went to stand outside. I’m standing out there and this very old, very fat, very short man (he looked a lot like Danny devito) walks up to me and says “Aren’t you just the cutest.” He then pinches my cheek and walks away. I’ll never forget him.
In my experience there is already such a wealth of professional and hobby products out there that it’s impossible to break into the market. Find something you like and just do it as a hobby if you can recoup any of the cost selling what you make that’s great but it shouldn’t be the main focus. The worst thing that can happen to a hobby is it becoming a job.