Like the other guy said, electrical and plumbing are not hard to do correctly with a just a little bit of knowledge or experience with modern building practices.

You can't just throw random trash together but there are simple "standard" ways of doing things with standard available wires and pipes and fittings and as long as you follow common practices you will be 95% of the way to a code compliant install. It is only when you want to do something in an unusual or shortcut way that you may run into real compliance problems.

Certainly don't try it if you are completely clueless, but reading a diy book or watching some diy instructional videos will get you pretty far and show you how standardized most residential construction is with hardware store materials.