Condoms and Bc ?

Well I’m 13 almost 14 and my boyfriend and I have started to talk about becoming sexually active. I’m aware the consequences that come along with being sexually active. That is why I was wondering the best place to get condoms from and what brand. My mom has recently been saying that “when you feel like you and him are gonna be active *sexually* just tell me and you’ll be put on the pill, even if it is now.” My boyfriend is coming over Friday and we’ll see how things go then but if it all is good then next time we plan on having sex or having sex again. I’m aware I’m young, however I feel ready. :)