I started having a problem with this last year, made worse by the water making the wax in my ear swell up, making me deaf (temporarily!)
Swimear (ie alcohol) works OK for very small amounts of water, but doesn't do much it seems if there's more than that. If I do get water in now I'm desperate to get it out as I know if I don't I'll probably go deaf in that ear for a while. The only good way of getting the water out for me was recommended by a GP, but clearly isn't "official" advice (it was my mum!) – and that's to rip and twist a bit of kitchen roll into a long thin "spike" and then GENTLY poke it in to suck up the water. It's very absorbment and usually works if you haven't managed to shift it by the more physical methods. Don't be tempted to get pushy with it though – nice and gentle to avoid poking your ear drum or pushing wax onto it.
If you're having problems with wax (which can be exacerbated by swimming) then syringing yourself is perfectly easy… drip some olive oil into your ear a few times a day then wash out that syringe you use to bleed your brakes and gently flush your ear with warm water 😉
Speedo Biofuse earplugs are absolutely brilliant for me after trying mouldable silicon ones and Zoggs. Highly recommended.