Hey ladies I need advice to not give up 😦

When my son was born I breastfed him until I left hospital when I got home I was so overwhelmed that I switched to formula , my son just turned 3 months and I notice I still have milk when I apply pressure to boobs , he refuses to take breast since he’s used to being bottle fed so I decided to try exclusive breast pumping , I am in my 2 day and first day I got a little under 5ml of breast milk for both not each I’m in second day and just getting a few drips is this normal ? I know the first milk that come out is colostrum but don’t how much should I be producing

Been drinking atleast 8 bottles of waters

PLEASE HELP

Also

Been pumping every 2 hours