First time breastfeeding

New momma of an 18 day old babyboy and I have started having trouble producing enough booby milk for him. Does anyone have any tips for me that may help my production? I’m eating a lot of fruits and upping my veggies. Drinking tons of water and a couple Body Armors a day along with a propel, (have been told they help production), and have been trying to limit my coffee intake. I have also been eating a lot of oatmeal and started drinking oat milk (done some research that says oats can be very helpful to production). I just wanted to see if anyone has any options that maybe hadn’t been thought of or wouldn’t be in any research. TIA!!

Edit:: I think my supply is low because my little boy seems dissatisfied after eating or is fussing while on the boob