Ohio Gazaimusu!

Hajimemashite. Boku wa Nikku (Nick) desu. Juuhussai desu. Boku wa Oosutorariajin
Kyanbera daigaku no gakusee desu. Ima ichinensee desu. Senmon wa nihongo to kokusaikankee to rekishi desu.
Doozo yoroshiku

-- Im learning beginners Japanese, and thought it would be good practice to introduce myself here

However, I don't know if it is all correct and perhaps are minor mistakes

Also apologies for having to use romaji but I don't have the ability to use hiragana/katakana on this computer ^^
So anyone else like to introduce themselves here? Just so I can get some practice + Get to know some of you!
[Please dont make it too difficult, and I don't know kanji yet]