The gym is meant to be a place where you strengthen your body, not be intimidated by the bodies of other people.
When I first started going to the gym, years ago, I felt intimidated. I had no idea what I was doing, how to use most of the machines, what correct form was, how to use free weights and I got stared at because I was a twig and that feeling was very awkward. But this is normal and everyone starts somewhere, right? But I pulled myself together and kept going, regardless of what others thought of me. Now I go to the gym all the time, not giving a shit what other people think of me. I’m there to work on myself because that’s really all you can ever do. You can’t work on other people, so why care about what they think?