Actually she wrote very well. There are only a few mistakes.

Who wants to start a conversation whit  with this funny girl?

Hii Hi everyone! I'm new on this website and I would like to know new people and improve my knowledge in with (or using) conversation. Who wants to talk? :)

Who wants to have a conversation with this funny girl?

Hi everyone! I'm new on this website and I would like to meet with new people and improve my english conversation skills. Who wants to talk? :)

Wait for a teacher Giulia. I just tried to correct it. I think ı have made some mistakes too :)