Welcome Mgm! For supply, I found Fenugreek tablets to work really well, didn't need to take them for long before supply started to boost! Also Milo was good for us too. Not sure why, perhaps the protein in it, but it just was. I've heard Activite is good too.

Have you got a sling or a pouch of some sort? That could help free up your hands if bub likes to be carried all the time perhaps.