How to get baby to start latching after 3 weeks

Lacy • Mommy to my precious little angel, Spencer💙 Expecting my little rainbow baby In September❤💛💚💙💜 Married 💜💜💜

I thought I wouldn't be comfortable with breastfeeding, but my supply from pumping won't go up and my baby is starting to eat more. I want to try to breastfeed but he won't latch. Any tips? Can I even get him to latch after 3 weeks and 2 days of bottle feeding? I've tried every to increase my supply and I think this is the only way it will work. Tia!