What type of self defense classes should I take?

I'm 13 years old and I am turning fourteen this yr. I will be taking the subway by myself for higher college, and I want to learn self defense classes. I dont always want to defeat an attacker, but I want to be able to immobilize the attacker long enough for me to get to safety. I guess, in a sense, I want to learn what to do when I am being attacked. Can anyone make suggestions on what type of classes I could take?

Kick him in the nuts.

That will be 5 bucks.

Self Defense

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