I wish I had a friend to go to the gym with!! I think you will love it!!
Just wear something that you feel comfortable in (like a shirt that doesn't go up too far when you stretch, etc.) and you will do great.
Act like you belong there just like anyone else there does, because YOU DO!
I'm so proud of you for going out of your comfort zone and trying this. You are awesome, JustB.
Let us know how it goes!