Hi Bex and welcome to the tree. I made the switch to pockets at around 6 months but I did use some successfully earlier, as long as the fit is right most will contain even BF poo. Like a lot on here I always had a bit of a mix of nappy types and used different ones at different times of day (ie I always put a tots bots or other fitted with a motherease wrap and a paper liner on as his first nappy as he always did a huuuuuge poo at around 9am
). Then I could go to pockets or whatever I fancied!
Good luck with it and I look forward to chatting.