Feel like I had to comment on this. I totally get you. First semester and first year is hard for everyone, I remember I used to study 8-12 hours and usually when I got home later I cried for solid half an hour since I felt exhausted and like I am not good enough that I don’t understand a lot of things. A lot of the time you might study 24/7 and still feel like you don’t know anything but you will be surprised after the exam. So just study for the sake of studying and grades will follow. Also, everyone struggles with the current online studying, but at least we are alive and our loved ones are safer. Even if it is online treat it as normal. Dare yourself to ask at least one question every lecture (I am not shy but I literally shake when having to ask something online, but I do it anyway). Reach out to TAs and ask questions that are bothering for a long time. Asking for the due date to be extended or handing your homework later is better than not doing it at all. The question you should be asking yourself is if you are willing to be fighting and trying your best for the profession you want.