I have been in construction since the early 80s and a General B contractor, and have worked on everything from lake size ponds, to high rise buildings and everything in between. My point is not that I know everything, because I do not.
But, there are 2 things I would never recommend a person doing unless they are very knowledgable or have someone who is that walks them through the process and that is..
There are just so many things that can go wrong that it really is not worth the risks, especially with electrical. It does not take much imagination to think of the outcomes from the slightest mistake.
Plus, if something does happen and you do not pull a permit on something that most likely will require an upgrade to present codes, things can really go wrong and insurance will not be there.
I say just get a licensed, insured and bonded electrician and you will all sleep better.