If you don't have a Japanese name, your name is written in Katakana. Only Japanese names can be written in kanji or hiragana. If you don't have a Japanese name find out how to say your name in Japanese Here.
If you have a very unique name you can try to find out how to pronounce it using its pronunciation. Non-Japanese names go by the pronunciation, not the spelling. Using your name you use the closest possible translation based on pronunciation. If your name is not in the list of common names you can contact us in the forum to find out how to say your name.
Practice writing your name and pronouncing it the Japanese way, not the way you usually pronounce your name.