HI B.,
It is going to be ok. It may take him some time to get used to being away but he'll end up loving daycare. Just be sure that you find one that you are 100% comfortable with. Ask the daycares you tour lots of questions about what kinds of activities they do with the kids. what their daily schedule looks like, how they handle meal time and nap time, their cleaning schedule and any other important subjects you can think of. Be sure that in addition to touring the daycare, *you* also interview *them*. Go see the daycares when they are in full swing so you can see how they interact with the kids. If their philosophy/parenting style doesn't match yours look for another place.
In terms of a transition, I wouldn't toss your little guy in full-time the first week if you can help it. What works best for us is to transition over about a week (no more than 2) where you bring him to care for some half days. This will help him get used to the environment and caregivers and also the level of noise and activity. Most kids are pretty overstimulated for the first week and it will be comforting for him to be able to go home and nap where he's comfortable. By the second week he should be fine to go full days. The transition time always depends on the child, but if you have a good place the experience of daycare will be really good for him.
Be prepared for separation anxiety at this age. Help with that by coming in the door, giving the caregiver the info she/he needs being happy and positive and telling your little guy, "I'll be back at the end of the day." Hug and kiss and out the door. He will do much better with a quick goodbye, even though that will be very hard for you.
Also be prepared for him to get sick fairly often if this is his first dip in the germ pool, and know that this is very normal.
Good luck!!!