You can learn to write the Hebrew word "shalom" by consulting Hebrew language learning websites, such as Judaism 101, TheRefinersFire.org or TheJewishDictionary.org. Remember that Hebrew uses the right-to-left direction. "Shalom" is made up of four letters: "shin," "lamed," "vav" and "mem soft." Hebrew has no vowels, but instead uses dots and other symbols to indicate vowel sounds and their placement.
It takes three pen strokes each to write the letters "shin" and "lamed." "Vav" requires two strokes, and "mem soft" is a single pen stroke. The website Judaism 101, also known as JewFAQ.org, has a good guide to letters of the Hebrew alphabet, or alefbet.
Be sure to add a dot above the upper right corner of shin, so that the letter produces a "sh" sound. Place a symbol resembling the English letter "T," called a "qamets," below the shin, to yield the "a" sound. The vav also needs a dot above it, to make the letter produce an "o" sound.
Writers of Hebrew text often use a calligraphy pen, so that some lines are thicker than others; however, the use of such a pen is a matter of personal preference. Some people place more emphasis on this characteristic than others do, and there is no truly right or wrong choice.