First build: lefty TL-1L telecaster

[colin2121]

also I am very confused about this diagram, the Neck, and pickup wires seem to have 2 inside of them, one is insulated and the other is not, how am I supposed to connect something like the yellow pickup wire because it seems to split in two?

I also forgot to ask, the jack is supposed to have a hot and earth wire but mine only came as a single one

For the pickups there is one wire that comes out from the pickup. The hot or active wire is the one that is insulated, the other is the earth or ground wire. Both earth or ground wires solder onto the back of the volume pot. The insulated wires are connected to the pickup selector.
For the jack, the solid prong is is the one that contacts the plug on the lead when you plug it in. Don't touch that one.
The lug directly opposite coming from under the insulation is the active connection. Your hot wire connects there. That is the yellow wire from the control plate.
The other lug coming up from the metal plate is the earth or ground point. One of the black wires from the control plate is connected to that lug.
If you have any problems locating the correct lugs post a photo as sometimes the jacks can be different. A photo of the pickups is also helpful as sometimes the factory uses different wires.