Congratulations to you!!!
Yup my milk flow was slow too for both kids. I'm afraid I dont't know any way of making it faster. I think it's just how our breasts are made, some mums can have milk squirting many feet away. For me mine just drips
Your baby is still very young and it is good to allow bub to establish your milk supply by latching on as many times as needed and for however long bub wants.
It is normal for babies to fuss at the breast early on as well, dont't forget they too need to learn to breastfeed. As long as they are wetting nappies you're doing well and there is no need to supplement with formula
Also in the early days they may keep asking for for a feed even though they are full because suckling is comforting and in a new environment it's probably the only thing that comforts them. Comfort sucking will help you increase milk supply too, so dont't be afraid to let bub latch on all the time
All the best!!