I would like speak about my country Egypt . 

It is located in northeast Africa and sinai peninsula is located in Asia. Egypt is overlooking on two seas. Which are The Nile river which comes from the south of Africa .

I would to talk

I would like to talk about my country Egypt, geographically. from Geographic hand .
It's located in northeast Africa and Sinai Penninsula is located in the Asian part.
Egypt overlooks on two seas and in Egypt there is the Nile River which comes from the south of Africa.

I hope that I didn't change what you meant in this description of Egypt.  You should tell the readers that the Sinai Penninsula is part of Egypt as it's not clear to the reader that the Sinai Penninsula is a part of Egypt.