Once you get used to it, it's not so bad. However, cutting both Maddie and Ebony's nails is a nightmare - they both hate it! When you just touch Maddie's feet she get so angry. So to cut their nails I have to do a nail every half an hour or so. Hehe. But I also cut my neighbour's bunnies' nails for her, neither of them mind at all.
What colour are your rabbits' nails? White/clear nails are very easy, you can see the pink quick very clearly, so you know where to cut to, just above the quick. Blacks are more difficult, sometimes, if you shine a torch up through the nail you can see it, but I find that a bit trick, so generally I just cut the tips of black nails, and do it more often.
And don't worry if you do cut the quick - I have done that before - it won't bleed very much, to stop the bleeding dab some quickstop, or flour onto the nail and it will stop. When it happened to me the bunny didn't seem bothered, must not have hurt.
Once the vet shows you how to do it, you shouldn't have too much trouble doing it yourself - invest in a pair of proper rabbit nail clippers (available in petshops) - big help!