breastfeeding questions

hi! so i had my son in november, he had crazy latching issues, so i exclusively pumped. well i decided to try and latch him, he did it! since i’ve exclusively pumped since day 1, i have absolutely no clue what i’m doing😂🤷🏻‍♀️

1. he’s used to drinking 4 oz every 3-4 hours, how do i know he’s getting enough?

i try to pump after but barely any milk comes out, so i’m assuming he drank it all?

2.WHY WONT HE BURP AFTER😂😩

3. dry cracked nipples, what do i do?! coconut oil isn’t helping!

4. he only drinks for like 5-10 minutes... is that enough?

5. he acts super hungry about a half hour later, but i have no milk to even pump. so am i running out of milk?🤦🏻‍♀️

i’m sorry if these are dumb questions, this is all seriously new to me!