Whenever people ask me where I'm from at school, I am going to try to convince them that I am Russian.
Why are you going to convince people you were born in  a foreign country?
I feel it has gives me a more interesting personality
Classmates rely on each other to be trustworthy. It's wrong to lie to people and tell them you are from somewhere you aren't. When they find out the truth, they will dislike you.
Yeah, I've been getting mixed receptions because of people finding out.
That's because while it is a small white lie, it is still a lie and one that is probably easy to disprove. You'll seem like a weird kid if you keep trying to deceive people with your country of origin.