Romaji.. first ever attempt! Corrections and advice please!

Konnichiwa! Lara desu. Nihongo wo benkyou shiteimasu., demo chou (better: totemo) muzukashii desu! Watashi wa Ingirisu jin desu., demo ima, Nyūjīrando ni sundieimasu. Watashi wa snowboardo no sensei desu. to fuyu no aida ni, Niseko deni hatarakimasu. 

*We use "desu" and "masu" at the end of the sentence. If you want to continue the sentence, you have to use other conjugations or connectors depends on the sentence. Ex.) ...benkyou shiteimasu ga, totemo muzukashii desu. / ...snōbōdo no sensei de, fuyu no aida ...

Good job! If you haven't learn the Japanese characters (hiragana and katakana), I'd like to recommend you to learn them first. If you know them, please write your notes with them. Anyway, I hope this was helpful. Ganbatte kudasai!