help and advice!

hello everyone!

I am having my second and would really like to stick with breastmilk. I have decided to pump because I need to see how much LO is eating and so I wont stress about the perfect latch. My concern is that I will not pump enough and I also uave no idea what Im doing. Could you please give me an idea about what your pumping schedule was like and things that you found helped your supply. any necessary things that I should purchase. I really want to make this work but im afriad that im going to give up and switch to formula because I'll be too worried and anxious. Thank you in advance!