I got divorced when my son was 2 and he has been in daycare full time ever since. He has been in both in-home daycares and centers.
Mothers leave their children in full time care everyday, and it does not make us bad mothers. There are many benefits to your child being in full time care. A consistent routine - the same schedule everyday - will help him to feel secure. He will know what is going to happen next. he will also get social interaction with the same children everyday, which will help him learn to make friends.
He will probably cry at first, most kids do. I worked in a daycare center for two years - and I can tell you - kids only cry for a minute or two, and then they are fine. Now that I've been on both sides of the fence - as a mom leaving my child and as a daycare worker, I can say it's definitely harder on the parents than it is on the children. Make your goodbyes short, and establish a routine (it will take a few weeks to do that). With my son, I'd help him take off his coat (if he was wearing one), then I'd walk him over to the daycare teacher (at a center), give him a hug and kiss and tell him I loved him and that I hoped he had a fun day. After he got a little older, he didn't want the hug and kiss, and asked me not to kiss him in front of his friends, so now we hug and say I love you and have a good day and he runs off to go play. At first, there were some tears - he cried for a few minutes after I left - but I showed him on the clock what time I'd be back to pick him up and once he realized that I always picked him up when I said I would... he tears stopped.
Most centers offer a daily note which tells how your child's day was. Any good in-home daycare of center will also encourage you to call and check on your child if you are worried. Many also allow you to drop in anytime during the day - though I would advise NOT letting your child see you if you do this. It makes it harder on your child because then they think it's time to go home, and they have to do the goodbye thing all over again.
Your son will be fine. Most centers will have an incident or accident report that they will give you if your child gets hurt - whether he trips and falls, gets hit by another child, or he he is the one being aggressive with another child.
Choose a provider that you are comfortable with and one that encourages open communication. And it really is harder for you than for him...