This is my dilemma. I need a solution immediately. Please … solve away for me !!

Alright, I am currently a Canadian citizen. Born in Canada. 18 years old. (And a girl, if it makes any difference)

My goal (which cannot be compromised) is to become an FBI in Washington.

To so this I need to of course become an American citizen …
Obtain a degree from an American University …
& do this all before i’m too old !!

So because I’m behind in highscool I am getting my diploma online. It’s not like a GED I am doing all the work getting all the credits just online. Can I still apply or hope to get a scholarship to any university in the USA? ( Or maybe get loans, because I could never afford it. )

Next, How do I get the citizenship ?
My grandmother was an american citizen (she lived in Canada but never wanted to become a citizen.) So my mother mentioned something when I was younger that I had the choice to become a citizen because my mother never ever got married. What’s this about ??
How do I figure it out ?
Who do you talk to about it ?

My plan is to get my highschool diploma from now until I’m 21 (or sooner, but I am not sure.)
Then homefully have a scholarship or be accepted into university in the usa. Move there.
Go through university for 4 years, get a degree. I will be 25.
Apply to the FBI. So I won’t be too old.

I know it’s going to be so hard, but I’m up for the challenge because I want it more than life itself.

I need all the advice and help I can get. I have no information and I don’t even know if it’s possible. I’m hoping for you to tell me it is !!

Merci!