u/ImpossibleParfait973

What (or who 😁) made you realise that you were bisexual and what was the story behind it!

I'm in school and we haven't been taught calculus yet(we're not learning it this year) but it interests me quite a bit, so i was wondering how do I learn by myself. Like do I watch YouTube videos, or are there any specific textbooks(preferably online and free) that I can use. I know basics of math, but is there something else I need to learn before going ahead? I'm also probably underestimating the difficulty level of this, but I'm excited to try.

EDIT: I am completely new to calculus, I know nothing relating to the subject.