On YouTube there is a good video I can recommend by someone called Quantrik. Search "Quantrik 65% Tutorial" and you should find it.
As for north/south facing stabilisers, I've heard people say all south facing sounds better. Sometimes spacebar is north facing, which allows for overall a smaller PCB profile as the stab holes jot out a bit. Feel free to DM me on Discord (Lewis Flude#0001) if you want to chat more!
