The only trick there really is probably to just make sure the control plate is bolted on before you put the carb on, these are probably one of the simpler engines; believe me, there are worse!
To set the govenor arm on the shaft, you will need everything bolted on, but loosen the little bolt that clamps the arm. then hold the arm to wide open throttle and twist the govenor shaft (that goes inside the block) the same way until it stops. then simply tighten the little bolt. It can be a bit fiddly, and when you first start it have the kill wire at the ready in case something went wrong.
