The endgame will be the greatest challenge for the beginner, but there are two things to remember about it, regardless of how you fare initially. Win or lose, getting to a bona fide endgame is an accomplishment in and of itself.
What I mean by a "real" endgame is one in which the number of pieces in either side has been reduced to just a few and there has been some genuine give and take, with each King having to maneuver or be protected by pieces as the other side angles for a checkmate. Typically, a few checks are involved in this process.
Secondly, this is the supreme test of patience in the game, and the mettle of a new player is often proved - and improved - in the end game. This is also the place where your understanding of the abilities of each piece and your ability to predict coming moves of your opponent will be very helpful.
The new chess player should aim for focus until the opponent makes a mistake - most often by being too aggressive. Take small advantages and bide your time. In this way, you will often end up in a position to win.
The next - and final - chapter will recommend books that go into detail about the endgame. Absorb them if you are so inclined, but let experience guide you as well. This is the start of a great adventure, and there will be plenty of time to read and study the moves of others. See what you can figure out on your own - you may be surprised at how much you can learn on your own.