I don't know if you're in some kind of cast but you can go to the pool and swim with a pool buoy .......... pronounced pool boy but nothing dodgy about it.

It's a figure eight shaped piece of foam like - kind floatation device so you can swim without using your legs. It tucks in between you thighs and keeps your bum afloat so all you have to do is use your arms to swim.

You can do freestyle and probably backstroke aswell but I've never tried it for some reason. Breastroke and butterfly are not really happening with you hips held afloat on the surface like that. It wouldn't be comfortable. You could do one armed fly though because wouldn't have as much up and down hip movement.

Maybe best to give it a go and see what's comfortable for you. You can get a bit of an aerobic workout though and it'll keep your arms and back in shape