breastfeeding increasing yield

i’m returning back to work in less than 2 weeks. i want to be able to increase my yield and supply for my baby while i’m away. i am the main caregiver and it’s very tough for me to pump even 5/6 hourly once. what should i do? also. my yield for left and right differs a lot. like halved. what could i do? #firsttimemom #pleasehelp #FTM #firstbaby #thankyou