Replying to Film school?

so looking for some school advice here
im in grade 10 in high school
decent grades like one or two a's couple b's some c's
gonna try to pick it up more on my finals coming up though

but im kinda thinking i wouldnt need that good grades to get into film school? (not saying im not gonna try to get better grades but)

and im wondering how it would work
im in bc
and ive heard theres this really good one in vancouver
but after film school you dont exactly just get picked up by someone for a movie or something do you?
its mostly starting off independent projects and then showing it to bigger companies?
i dont know if im completly right there or if its easier to get working for someone with something like that.
but otherwise im thinking theres a pretty decent sized posibility of not getting like a job somewhere and not having really any job insurance for a short while or even a long while

i dunno id love to film movies and stuff for a job thats all i can really think of doing after high school. just wondering if anyone knows what your options are after film school?