I'm confused, people.

There's a lot of factors that may make me incapable or my response be insufficient, like the schools, places, or that I'm a grade lower than you, but from what I've experienced she either forgot by now, she still remembers it but you can still make casual conversation, or she will never talk to you again. That last one is very unlikely, you can probably make casual conversation with her and her not mind from my point of view. Take this with a grain of salt, but I think you're all good.

Hi! My name is Rowel! I'm an Indian-American boy who is a 8th grader living in the U.S.A.
I need some help....
I'm trying to be friends with a South-Indian girl (who actually looks really attractive, but that's not the point) who I, ummmm, terrified a lot in 6th grade by jumpscaring her. By jumpscaring I mean like just randomly saying her entire name while having a goofy expression on my face (what makes it funnier is the fact that she has one of those extremely long, Christian, Baptised kind of names, with 2 Middle names,and a last name!!!).
I was an idiot when I was younger.
And I really do care about her.
What do I do?