こんにちわ。わたしのなまえわ は かめろんです。
You'll learn later that the "わ" is written as "は."
は is called a particle. は denotes a subject, but there are a lot of other particles. In your sentence, your name is the subject, so は comes after わたしのなまえ.
Then you'll learn Katakana so you can write your name in Katakana. :D