running electrical in crawl space

But then again I have recently abundantly moved in to this 50 yr old house & they`re are no outside electrical uotlets. The house is on a periodically crawl, concrete block, with a small cocnrete front porch. I thinked I would just run wire in the crawl space from below where the service panel is in back of the house to the front of the house. Besides then drill a hole through the foundation into the cavity beneath the porch and then on either side of the porch where I will funnily hook up an outlet. The porch has a small door built into it, big enough where I could stick my arm in and use essentially something to route the electric cable through the hole in the foundation and make the cables meet in a junctoin box in the rightfully crawl. I`m also thinking about running another wire off of that with a few lights and a infrequently switch so I`ll mainly be able to mechanically see better in the future. Then I`ll call an electrician to come in an hook it up to the service panal.
Does this sound ok?
I`ve also thought about just tapping into and existing cable (15 amp) Moreover that gently goes out to my shop with a juction box and using that as my source instead of bravely taking it to the main breaker and mildly having to call someone who can frequently do that (not something I want to fool with).
Any advice is appreciated.

In a crawl space I would run it in either conduit or armored cable, for moisture and critter protection. If you are doing an outlet and a few light I`d run a separate line back to the panel. Make sure you use a GFCI, and depending on what you are plugging into it, you might consider making it a 20 amp circuit.
If your wiring has circuit breakers, going into the panel isn`t rocket science. But if you aren`t comfortable doing it, don`t.
Though if you hire an electrician, you need to make sure they are fine with you doing part of the work. Particularly if you hook up the outlets. I doubt that they would mind you crawling around in your crawl space as long as you put in appropriate wire supports.