Seriously need help!

I’m 1 month pp and just starting to pump. I’m totally clueless on how/what to do. I’ve pumped three times total (once last night, once in the morning, and once after I fed tonight).... the first and third time I didn’t pump very much milk. I’m asking for any and all advice on what to do, how to pump, how store breast milk, how to feed frozen breast milk, etc.