I lived with my parents for the first year. The hardest thing for all of us was adjusting to me not just being a child, but also parenting whilst being parented myself, if that makes sense.
Be prepared for a lot of people you classify as your friends to drift away from you, because they can't deal with the reality of a baby. Hopefully your closest friends will stay by, I remember good friends of mine dropping me in essential supplies of chocolate when I was establishing breastfeeding
But a lot of them couldn't deal with the fact that I had to say no a lot; "No I can't come out tonight, I have a baby." "No I can't do there, there's no space for a buggy."
It does get easier though, because you meet new friends, Mum friends. I have some really wonderful friends now, most of whom are a good bit older than me, but who I get on with fantastically.
If your brothers are younger, try and get them involved. My brother was 12 when my DS was born, so still on the cusp of childish jealousy. He was actually fantastic, but I did make sure I had a big chat with him before the baby was born. I also talked to him about the fact I would be breastfeeding. If you're planning to breastfeed, it might be worth talking to your brothers whether they are older or younger, just so they know where you stand, and you don't have to deal with any typical-brother-reactions
whilst you're trying to get sorted.
Where abouts are you? I'm near Brighton if that's any use. I don't think I have any small baby clothes left, but I have some toys and things if you needed anything.