はじめまして!
はじめまして!わたしはブリアナです。わたしはにほんごをまなびたいです。
よろしくおねがいします!
(Nice to meet you! My name is Breeanna. I would like to learn Japanese.
Please take care of me!)
Nice to meet you! Good job. but you don't usually need to put spaces between particles in Japanese