how to get over embarrassing moments?

i want to get into swimming to lose weight. my swimming isn’t perfect but i can get by. i went to do laps today for the first time (ive only ever done group lessons in leisure pools) and had an embarassing moment that made me not want to ever go back. and i’m also afraid im not following proper etiquette.

so i got in, there were like 4 of us in the slow lane and we were circle swimming. i needed frequent breaks and when i did, i just stayed in the corner. and i made sure to wait some distance before following the person in front of me. halfway i switched to back crawl, and ended up hitting a guys butt and i apologized but it was so awkward and he seemed annoyed(rightfully so)

so i left and told myself im not ever coming back. but now im conflicted. aside from some mistakes, i was having fun.