[alanX]

Not bad at all for a beginner, bro.
At least your already on to kana.

Basically, the "wa" that you hear in "Konicheewa" is the particle は。
Not a big mistake at all.

And for the second sentence, it was just a grammar issue.
In english, we say My-name-is-X.
In Japanese, we say

My-の-name-は-X-is。
わたし-の-なまえ-は-Ｘ-です。

But native speakers usually just shorten to Ｘです。