as the title says, is there anything I need to know apart from the obvious (cpu/motherboard) as it will be my first time fitting in a cpu and motherboard
Nope, everything else should be fine. Just need a new Mobo/CPU combo.
You just need to be careful fitting everything and don't forget to attach all the stuff back together. You say its your first time so just take it slow and everything will be alright. Intel CPUs are different from AMD ones in that the pins are in the sockets but yeah that's about it, just don't rush.