Is it bad to be shy and what is a good way to break being shy so I can let out my true submissive self?

Hello shy person. This is His kitten. Being shy isn’t necessarily a bad thing especially for a sub. It is my experience that your true submissive self will come to the surface when you find the right partner. Notice I didn’t say Dom. You want to find a person with whom you get a along with on a personal level. From that foundation you can build a BDSM relationship in which you feel safe and respected enough to fully sumbit.