my father is a simple man
You could tell more about your father than just saying "simple"
My mom is a
typicalhousewife homemaker.
If I mistaken anything then forgot me because it's my first time on stage. -> rephrased : If I made any mistake I am sorry, this is the first time I am talking on stage.
I would suggest you remove this and concentrate on how you can do well without mistakes :)
I want to be a good engineer -> You could tell everyone what interests you in this field and why you chose this branch etc.
I select it from my own, not to be forced by my parents or any other person. I am a simple guy having a little creative nature. I like to make changes.
Rephrased : I chose this branch on my own. I am a creative person (you could give examples of what you did). I always correct my mistakes and am open for a change.