That is a tall task, but the pieces taken individually are all reasonable DIY projects.
We would love to see some pictures as you go...before, after demo, during construction, etc.
Think of this project in major groups:
structural....integrity of the flooring, etc.
finish floor
walls (a) shower (b) the rest
fixtures....sink, toilet, tub
plumbing...the faucets, the toilet flange, the pipes in the walls.
electrical....lights, fans, outlets
Any home store, and especially your local library, will have an assortment of books. I would start by just browsing anything you can get your hands on. Your own house never seems to look exactly like the pictures in the book, but it gives you an idea what your are getting into.
This forum, and others, are excellent places to get helpful info. The more specific you can focus your questions, the better the answers you can get. Don't hesitate to come back here often. If this project takes you a year, your wife may not be happy but we will be with you every step of the way!!
Possible first thing to think about: Water. Assuming this project will last a while at least, you are going to need to be able to shut off or cap off the water to the sink, toilet, and tub so the water can be on in the rest of the house. Take a look at your situation, and this might bring up the first questions you need to throw at us.
OK, time to get to it!