If you are leery of undertaking such a big project, you may consider buying the type of dishwasher on wheels that is enclosed in a cabinet. You can roll it around - store it in a closet, etc... It plugs into the wall and the water supply and drain screw onto the kitchen faucet. Other than that, it's a normal dishwasher. It might be the easiest thing for you.
Otherwise, what can I say except be careful. If you haven't done work like this before, there are a lot of potential dangers - especially where water and electricity are concerned.