It is a bit hard for foreigners to directly type Traditional Chinese before they learn how to write Chinese characters... Hong Kong people use a kind of typing system called 倉頡, and it is all about shapes and strokes of Chinese characters instead of pinyin (about sound).
If you really want to type Traditional Chinese, there is another way: find a webpage that can help changing simplified chinese into traditional Chinese with one click. keywords for searching such kind of webpages: 簡繁轉換