Is repair work fun?
Perhaps more important than your current knowledge of plumbing, electric, etc. is your attitude toward such things. Do you like to work on things and make them right?
Basic electric wiring, plumbing, carpentry are all easy to learn if you start at the beginning of the task and take it one step at a time. Good books are available on the subjects you need. People on the Forums are great about helping, and there is probably a lot of knowledge available from your family, friends, and neighbors.
If you consider such things fun and an opportunity to learn, go for it!
If you consider such tasks drudgery, don't mess with it.