We had difficulties with my first born. Here are some tips.
1. Finger sucking: Not his own, but yours or Dad's. There is a way you can help train his tongue to lay in proper position for latch-on. A lactation consultant can help show you what I'm talking about.
2. Nipple shield: Helps train his latch and your nipple to be an easier shape for latching. (We women spend so much of our lives trying to keep our nipples from sticking out, it bites us in the butt when we try to breastfeed.)
3. Skin contact. Your body will naturally produce more milk the more skin contact you have with your baby. Try nursing from one side while you pump from the other. Get down to your bra and him down to a diaper and hold him to your chest under a blanket. Make sure you can smell him while you're trying to pump. Along with his suckeling, these things will help teach your body that this is happening.
4. Until breastfeeding is established, make sure you feed him his bottles. Ideally with the skin contact and pumping at the same time. It is important that he associate your smell with food. That will help him learn as well.
It's not too late. I wish you and your little one luck and patience with each other.