You started out your post by saying you're not a handy person. Please take it from a professional contractor and everyone else here. It is a horrible idea to drill a hole through a door for this purpose.

Not only would you be creating a cold spot and water intrusion spot. The hole would need to be bigger than 3/4" as the plug end of a power cord requires 1-1/4" to pass through. Multiple cords equals a bigger hole.

Additionally, you're creating a serious trip hazard.

More information is needed to determine what exactly it is you're trying to do. People hook up generators (solar or otherwise) to their electrical panels but there are absolutely necessary safety requirements to doing so. If you're adamant about running a power cord from outside to inside, open a window and run it that way. If needed, cut a board to fit a partially opened window and drill a hole in it for your cords.

Just please do not put a hole in your french doors.