Beginners may wish to start by learning the rules to Klondike Solitaire. This is the most popular Solitaire game, the game that most people are familiar with.
Another simple solitaire game is called Pyramid solitaire.
For a greater challenge, learn the rules to FreeCell. More skill and mental power are required to play FreeCell.
Don’t be too concerned if you don’t remember all the rules. Simply play a few free games after reading the rules and everything will quickly become clear.
Below are links to the rules for three of the most popular solitaire games: