I want to go swimming so bad.

I haven't been able to comfortably go to a pool or anything in three years and it sucks cause I really want to go swimming with my (cis) friends. Do any of you have any tips on how to feel more comfortable with your body while swimming, where to get affirming swimwear, how to pass better while swimming (because getting clocked is such a huge fear of mine in a setting like that and I don't pass very well by default)