howwww do i get over myself and actually start writing

Okay so my last semester of high school was the only time in my entirety of high school I didn't take an advanced writing course. Literally all 3 years and the semester before, I was taking difficult writing courses and even if I didn't think my writing was great, I could at least finish an essay or two in the span of a couple hours. but my last semester I decided to take an elective course (creative writing) because it was something I knew I would enjoy and I thought it would be okay to just relax for my last semester. I've always loved writing, I thought ut would be fun. But I think taking a break actually broke my ability to write. I'm trying to write what should be a simple report for school, literally my first assignment for my college class but its like I'm broken.

I'm sitting staring at a blank google doc for hours, doing literally nothing except format my fucking page because I don't know how to start. It should be simple, but for some reason something broke in my brain and now I can't even string a sentence together. And before you ask, no I've literally never used chatgpt or AI once for any sort of english or writing assignment. I genuinely don't know what's wrong with me.