[mwambua]

I'd find an activity that you enjoy (and as other people have suggested) find folks to do it with through meetup etc.

The "enjoy" part was pretty key for me - as I feel like it's really hard not to be my best self when I'm having fun and more focused on the activity than making a good impression. I also tend to do well at things I enjoy, and that gives a helpful little self-esteem boost.