"What if something goes wrong? What if its broken? What if there is a security issue?" these are genuine concerns and you should do everything you can to minim

"What if something goes wrong? What if its broken? What if there is a security issue?" these are genuine concerns and you should do everything you can to minimize them. "What if no-one cares or uses it?" this, not so much. did you have fun making it? did you learn something making it? will you learn something launching it? if you can financially afford for it not to be a big hit, and you learned and enjoyed yourself and made something you're proud of, it's not a loss.