Username- I'm overweight too.
Getting better, but still.
give most swimmers a run for their money, although I'm not the fastest.
(Did a smart Speed Workshop today, so hoping that will change soon enough)
There are lots of shapes and sizes and it genuinely doesn't matter the size you are if you are making the effort and swimming in the best lane for you.
I'd suggest you take a course of lessons and promise yourself to commit to the whole course before you see if you want to stop.
Get into the habit, even if it's once a week, it will make a difference to your fitness and you will get better
I've gone from a size 20 to 18, and that's loose.. not lost a pound in weight, as have added muscle and I've never had such amazing arms. My legs are pretty good too, if I say so myself
Don't let anything get in the way of you feeling better about yourself.