Just get the ones from Boots/Superdrugs taht you stick on. It's really easy to do and they should last the night. I wear them when I'm going out sometimes. They're about a fiver. Alternatively, if you're that worried, then go to an eyebrow bar in one of the big department stores as they'll do it for you but it'll cost more there as you obviously have to buy eyelashes too.
I always use the Mac ones. There are tons to choose from and one of the make-up girls will always show you how to put them on, or do them for you. Just make sure you use plenty of glue and push them close to your own lash line.