Oh poor you. This is so stressful..but kids really do adapt much more quickly than you can imagine.
We took dd to nursery at 2 and she was a little clingy sometimes, but the staff always made me leave the room soon after we'd arrived. Once I disappeared madam made no sign of being in distress and I was completely forgotten. On my return, cue the tears again. All a performance for my benefit!!
With your ds it might be different because he's younger. DD was left at 14 weeks, so really didn't know much else, which may have helped.
Presumably you've picked out the nursery because you feel they'll suit your parenting needs. This will probably involve a lot of cuddling for your boy and lots of attention. The good nurseries are very adept at dealing with distress and it hopefully won't take long for things to settle.
I don't think anything will make it easier on you. Your son will adapt quite quickly, in all likelihood. Picture him happy once you've gone from the nursery door and you'll be less stressed about things. And he'll probably be o.k. when you're gone too.
Ring the nursery as much as you need to whilst you're going through the adjustment. Don't think of yourself as being a pest (couldn't spell nusciance). You're a paying customer and they should cut you lots of slack/support you through this transition. Make sure they report any problems from the get go and see how you go from there.
Good luck. With support from the nursery and your partner, you'll hopefully look back at this and think 'what was I worried about!'. xx