minna-san konnichiwa,
watashi wa nihongo o naratteimasu. kihonteki na bunpou o naratteamasu node kanjin na bunpou wa watashi o dekite imasu kara nihongo o benkyou shitemasu, tanoshiinodesu!
and the translation;
Hello everybody,
I'm learning Japanese. I've learned the basic grammar, and I'm ready for the essential grammar because studying Japanese is fun!
Hopefully I'm not getting to far ahead of myself.
minna-san, arigatou gozaimasu.