Walt Disney had the same problem you do.
Nobody supporting your dream?
Parents, teachers, employer, random strangers driving by your house think your dream is silly?
That hurts. I spent years trying to convince people I could write books. It’s no fun when it’s hard to raise support. But if you’re in that spot right now with your dream, I want to assure you that you are in amazing company!
In fact, in the book Ten Steps Ahead
“When Walt Disney completed his new studio in Burbank—a modernistic, glassy enclave of which he was very proud—his father asked Walt flatly if the building could be used for anything more useful than a cartoon studio. Walt, stumbling over his words, replied that it could be probably converted into a hospital, if the studio failed.”
Walt Disney was doubted. You will be too. Just don’t think that the arrival of doubt means you’re not working on something pretty magical.