Hello, hello, hello!! Any help for bio?

so I’m in 8th grade and i am struggling a LOT in biology. I have an F and every time i tell myself to do the HW i never do and when i do i still fail it and the tests seem really hard even if i understand it. If you guys can help me study it and help me understand it for the fast testing or whatever for the end of the year i would really appreciate it!!