First time mommy in August. What do I need?!?

Hi everyone! I'm hoping to get some help with a few questions. Well I'm going to be a first time mommy this August! yay! ;] Could anyone tell me (from experience) ALL what I'm going to need as far as how much clothes.... socks... um.... burping clothes... (I'm really good on swaddling blankets.. you think like almost 30 is enough? lol) and stuff like that? I'm making a list and checking stuff off as I go. I'm already 23 weeks and so far I'm about to buy a crib & changing table (really good price on the changing table so we're just getting it) and I have a swing, very good pump um... and just a few clothing items that my fiances sis in law has given to us. She just had her second daughter in January and so she's ping on all the stuff she grows out of lol so I don't really know how much that'll be by the time my baby girl Scarlett gets here but I feel like I need to be more prepared. Its also kind of hard because I won't have a shower until like June, so I'm not even sure what I'm going to have to buy. ugh. So right now can you tell me about how much clothes I'll need (how many onsies, sleepers, gowns, etc.) I just need an Idea on this stuff.... and also if you have any advice on what I really will need and what I may not need (like a diaper genie? lol) Thanks mamas ;]