My dad's business was taking care of Rental Property so I was an assistant plumber/electrician/carpenter/drywaller/painter from the time I could walk.
As such, commenting on the comments above about electrical/plumbing:
Electrical:
For a complete novice, I think the biggest thing to understand is the difference between 220 and 120. If you screw up with 120, you'll shock yourself. It really doesn't hurt and almost certainly wont kill you. One of the older electricians I worked with tested circuits by putting his thumb on one wire and running his finger across the other. If it buzzed him, it was live. 220 is a completely different animal, it can kill you. When I do 120 projects I almost always do them hot (breaker on) so that I know if it is working or not. When I do anything 220, I do that cold then turn the breaker on after I am completely done.
Another thing about electrical that will help you if you hadn't already thought of it is this: ALWAYS START AT THE END. Ie, lets say you are popping breakers in your kitchen so you want to add a new breaker and circuit. If you start at the breaker box and work your way out to the kitchen, everything is hot from the start. Instead, start in the kitchen and work back to the breaker box. Even if you don't want to do ANYTHING hot that is fine, have an electrician come in and hook up the breaker but everything beyond that is already done. Saves a lot of money without actually doing ANYTHING hot.
Plumbing:
It amazes me how much this has changed in my lifetime. When I was a kid we did drains in cast iron. A 10' stick of 4" Cast Iron Sewer weighs 170.9 lbs (I had to look that up, I only knew that they were freaking heavy). Lifting those onto threaders and then lifting them into place and threading them together was backbreaking work. According to the interwebs a 10' stick of 4" PVC sewer pipe weighs 10 to 14 pounds. Oh, and you don't have to thread the pipes anymore, just smear adhesive on the ends and stick them together.
I've said many times that modern technology led to women's lib. When I was a little kid there weren't any female plumbers. It wasn't so much because they weren't allowed as because how many women do you know that can lift up their end of a 171# stick of sewer pipe?
Anyway, I've done lots of plumbing with Iron Sewer Pipes and, in the old days, galvanized supplies. Then Copper. Now I have a pex tool and I'm pretty sure everything I've installed in the last 10 years probably weighed less than 171#.