[masaegu]

No, it doesn't sound normal. But I like your post because you did your best.

Real Japanese : 私はりんごが食べたい。

Hiragana : わたしはりんごがたべたい。

Romaji : Watashi wa ringo ga tabetai.

Remember that the particle 'wa' is written as 'ha' in hiragana, but it's pronounced as 'wa'.