Hello Tony,
I don't know how old are you but really want to encourage （鼓励）your bravery（勇气）that to show your homework here and share your family information. How about your father and your grandparents? You didn't introduce（介绍） them though（虽然）you mentioned（提及）them at your sentence starting.
Every sentence in this introduction are fine. the gramma is correct, what you need to do is read out loud if you need to stand up to do the introduction! Go, boy, you can do it!
Hope you and your family are keep well!
Best wishes,
Kiki