So from reading replies no dresses and no wacky prints. Get hair and nails done. I'll have to do some googling to find somewhere to get them done because I've never had them done before.
@Askma, I like that. It's nicer than any I've had before.
@Raindropsonroses27, Yeah I'd need a cover up any way.
@Ces6 and @Grasspigeons, I don't know if I'm brave enough for a bikini. My boobs are great but I hate my stomach. I have PCOS so carry all of my weight there. Plus because of that I have a hairy back. Thankfully I'm pale enough you'd not be able to see it but you could feel it. I might buy one and see how I feel wearing it in the house and see if I'd be confident enough to wear it too the beach.
@toucantoo I hadn't thought about the cut of the legs.
@funkythighcollector, thanks for the link I'll have a look at that now.
@Wearywithteens, got to admit I am anything but stylish so hadn't thought about the prints or cut's making me look older than I am.
@agteacht, I think there is a unanimous no dress response. Glad I asked before buying 
@FlyingMonkeys, hadn't thought of a sarong. I normally wear a shirt while I'm swimming. Partly to hide and partly to reduce the chance of burning. I think I'd worry about a high waisted bikini from rolling down my stomach.
@Wearywithteens, it's lovely but I doubt it would contain my boobs, and that's quite important because I'm going away with church friends and the guys would probably die 
@forkfun, I hadn't thought about the cut of the legs being uncomfortable. I was more worried about the top staying up.