Yes you'll be fine. Stay hydrated and use screen and personally I'd say be sure to shower/rinse not long after so you don't get sand in your privates of course
So i should be fine to sit in the water??
I've been a couple times, don't have a fitting bathing suit tops so I haven't been able to actually go out in the water completely but still get my legs wet and stuff, and haven't had any problems other than normal problems with the fact I burn easy
Just use a stronger sunscreen than normal