1:Consult a copy of the NEC Code Book
2: Consult a "DIY" electrical book.
3: Apply for and obtain the required permit.
4: Think about calling a licensed electrician.
THe switch cannot be located on a wall that the door swings into.
There is no height restriction that I am aware of for switches, excluding ADA requirements.
The studs that you "notch" cannot be structurally damaged or weakened by the "notches"
You must install "nail plates" to protect the cables.
Locations for outlets fall into the 6'-12'rule "it's in the NEC".
When in doubt; hire a pro. Electricity is dangerous if installed in an inproper manner.
The above suggestions are "my humble opinion"