My 2 cents. I dislocated my shoulder 2yrs ago at a tournament.(July 2021) First time, I was 64 then. Hurt like hell until it was put back in by the ER doc a couple hours later. i used the sling for a week or so but couldn't see a doc for 3 weeks. Physical exam by P.A. By then the pain was gone and I only used the sling for a week, got some PT exercises and stretches and it felt better within a month. Started free skiing about 2 months out and it felt ok. But ended up getting an MRI, turns out there was a big tear in the top Rotator cuff tendon and partial tear in the bicep tendon. Still felt ok and thought I would see how it felt in the spring. But took a minor fall snow skiing which resulted in second dislocation. i was shocked how easily it popped out of the socket, didn't even hurt that much. But it hurt by the time i got to the ER a couple hours later.
I wouldn't think skiing tournaments in mid Sept would be a good idea. Get the MRI and a good Ortho doc. I ended up having surgery in June 2022. No fun but ended up good after 6 months of PT. Full ROM and strength. Skiing again this spring, don't even notice the shoulder.
Problem is at this age, you get one thing fixed and something else seems to go wrong. Kind of like keeping an old car running. Have only skied a few times this season, started having first time ever issue w Sciatica pain just after snow ski season ended in April Getting PT for that now but it seems to be lingering way to long for for me. Can't seem to catch a break.
Good luck, hope you get back on the water asap, but don't rush it.