Ways to increase breast milk?

AC

I'm a first time mom and my son is almost a month old. I wanted to breastfeed but he wasn't latching on correctly so I pump. However, I feel like barley anything is coming out and it's making me feel really bad / sad 😔. I have tried drinking more water, oatmeal, lactation cookies & lactation drinks but I feel like nothing is working. The most I produce is maybe 3 ounces from both breast all together. I've been supplementing with formula but I really want him to have more breast milk.