Make sure that you select one that is appropriate for your needs. A family of five likely needs a larger model than does a single person.
Washing machines come in many different configurations and an array of features.
Installing a new machine is fairly easy as most units do not require special wiring, unlike an electric dryer. Remember, these instruction are fairly generic, check the information that comes with your unit. There are normally shutoff valves directly behind the unit. Shut these off and then remove the hoses from the valves. First try to remove the hoses with your hand, if that fails go to adjustable pliers.