Any tips on how to focus on studying while having a million thought?

so I feel like I’m finally having an academic comeback after years of failing & I’m currently looking at pinterest for that motivation. there are videos that are helpful tools for college students like websites that read chapter books and summarize/create notes & it seems pretty cool. but I somehow deny using those tools bc it feels like I’m cheating. my mind is like, “no, you will study the TRADITIONAL way (which idek what it rlly is)” I don’t know why my brain is doing this to me. I feel like these apps could be beneficial to my learning. what’s ironic is that I literally googled all my assignment answers for one class at the last minute to get some grades in. this is a retake class but because I was so behind on everything, I just looked up the answers. so that really does count as cheating. like bruh 😭 I did it to save myself from a bad class grade. I’m definitely going to study the rest of this semester. I have officially began taking notes and actually doing schoolwork. someone help me!!! these videos look like great resources but my mind is telling me otherwise. another thing is that I’m still lost on what to major in. I keep changing career choices and my head’s gonna explode. there are so many things I wanna say but I don’t want the post to be long. I just want to get good grades and understand the material!!! someone help me >n<

I'm in college and about an hour ago i had class. I like to sit alone bc I get a bunch of stupid intrusive harm thoughts. Anyway I couldn't focus AT ALL today. This girl decided to sit next to me and I wanted to ESCAPE. Like i desperately wanted to get up and leave to the bathroom and wait till class was over. I took a deep breath and stayed anyways and tried to focus on lecture but i kept getting so many thoughts and I kept hyperfocusing on my right hand (which was next to her) and my hand felt so weird! Like tingly?? I was like "omg why is my hand feel so weird?? Does that mean i want to do something?!" And it kept imagining me grabbing at her or grabbing my drink and throwing it on her while i was trying to take a sip. I tried eating my breakfast to distract myself but i was holding a fork and got another thought. I realized i was tensing my hands (as a compulsion... i try to keep them as still as possible and as close to me as possible bc the thoughts feel so distressing and the "what if i act out " is playing in my head) And I was internally panicking and now im at the library feeling sad and i feel like I need to solve this. I spent the past hour just mentally reviewing the whole class time rn. The whole class time I was at the edge of the table trying to stay as far as i could and i would get relieved whenever she would stand up to leave the class for something. I managed to make it through the whole class without leaving though but the question in my mind is bothering me so much, "how do I know that these thoughts aren't genuine or are thoughts I want to carry out and why was my hand feeling so weird?" I feel stressed at the library and i want to figure this out 😞

I can't focus on anything but my thoughts. I'm so inside my head, and my mom always tells me to focus on my body and my surroundings, but I can't, or maybe I just don't know how. I try to, but it doesn't help. The thoughts are still there :(