My son, too, learned from a bottle first as he was in the NICU for 50 days since he was born 13 weeks early. So, I was pumping the whole time he was there and even had some stored in the freezer. When we finally got home he really did not want to breastfeed and this stressed me out and my production began to decrease plus he was growing and was demanding more so my stored supply was getting less and less.
I researched a lot and come to the following conclusion and resolution. I had to have peace of mind that everything I produced was better than nothing at all thus I must not get stressed out about it. I know it sounds crazy, but before every pumping or breastfeeding session, I took a minute to close my eyes and try to concentrate on the happy things about my baby, almost like a short meditation session. Then I tried to stay in that place while I pumped. And concentrated on him if I was breastfeeding. Stress reduces milk production, so find whatever way works for you to de-stress. It is important.
As far as breastfeeding, I kept trying. I gave him a bottle in the beginning when he was hungry and then half way through, I would switch to the breast. This way he wasn't so hungry that he would get frustrated with the breast. Sometimes he would latch on, sometimes he played. Once he got the hang of it, I lessened the time that I gave him the bottle and increased the time I gave him the breast. I believe he was already 6 months old by the time I was able to breastfeed a whole feeding. But it did take a long time. Be patient.
I did keep the rented hospital grade pump to get the most out of me. I pumped after each feeding to empty me out and to make sure I was full when he was hungry again. I also drank more water than a fish. But most of all, I kept trying.