Baby Shopping

Hi everyone ☺️ just looking for some advice here. I'm currently 12w2d, so still quite early on, however I know that financially, we are not going to be able to buy all the stuff we need in a short period. So, I would really like to start collecting things now, I just have no idea where to start! So my question is, what would you consider okay to start buying now? I don't want to be spending money on unnecessary things, so what would you consider important that can be bought early? I'm trying to be smart about it, but as this is my first pregnancy I don't really know what to do. Any advice would be very appreciated! ☺️