How to gain confidence and experience new things and make changes right now? Small steps?

Immersion. If you want to gain experience then go experience something. Join groups or clubs. And I'll be honest it won't always be fun. Most of the time it will but sometimes you'll be nervous. Might not fit in. But you will grow from putting yourself in these situations. I also recommend practicing saying hello and talking to people you don't know. Idk if you've ever played a video game like maybe skyrim but in many of those games as you talk to strangers your diplomacy goes up. Same thing in real life. So think of each conversation as an opportunity for growth. Also exercise and fitness is a great confidence booster. and pay attention to confident people. Acting confident can give you real confidence. Stand up straight. Shake peoples hands. Look people in the eye. Chin up and smile. Just doing those things like standing straight like a confident person can make you feel real confidence.

Read think and grow rich. Read Rich dad poor dad. They should change your life