My all time favorite recomendation for first customs
PHANTOM
Why? EZ soldering. No SMD required, just solder on the teensy and everything else is through hole too
All hardware can be bought from mk.com(sans soldering iron, solder, and in your case, desoldering pump)
PCB, teensy, case, plate (coming soon i think) and switches (you don't need to buy) can be bought there
Iron, solder, and pump can be bought from the new geekhackers.org site