How to keep baby from getting sunburnt

Le

Okay so my son is 6mo and He’s never been to the beach I’ve never really had him out side either. I got baby sunscreen spf 50 and a swim outfit that is long sleeves and an unberella for him to sit under. Is that okay? Or should I have more protection. I don’t want to be out there and come back him be burnt. I also have a spray bottle with a fan attached to it. Advice ? And how long can he be out there under all the protection?