I cut nails everyday, Make it fun! We had a puppy in today that didn't like his nails done he was only 4 months old so they way I did it was do one nail then plenty of hugs and kisses then move on the next one. Yes it took along time! Build up their confidence and dont make it something they will grow to hate. Make sure you only cut off the tips of the nails too especially if hes very nervous you dont want to risk cutting off too much and causing him to have a fear about them being done.

If you dont feel you can do them why not ask a groomer? They are used to nervous dogs and will take their time to ensure its done carefully.