I used to feel exactly that way. The only way I got rid of it was pushing through it. Cause once I started sharing the things I liked, the more I found that a vast majority of people didn't think anything of it. And anyone who judges over it are just assholes.
Stressing over stuff like this made me far, far more miserable than any fallout from just being myself. But the downside is it doesn't seem like it until you experience it. But you can't experience it until you get passed it... it's a nasty cycle.
In the end, to get the process going, I imagined that all of those nasty thoughts holding me back were actually being said by most annoying character, sitting beside me. It gave me a target to tell to shut up.
I hope your able to show off what makes you happy, because it's worth it every time.