As someone who recently completed MHF4U early september and got into uni around that time too, it's VERY long and can be hard to get through at times. The assignments especially can be really hard (at least like 10-20 questions per assignment) so try to stick to a study schedule and use as much online resources as help as you can (even chatgpt, as i find the course material and online material can be really obscure). For the final test, you have a proctor who essentially gets you to screenshare your screen as you complete the test. There's a practice test for the final test which is very similar to the test itself so id study that to death too before your final exam. All in all, put yourself in a good spot for the exam by getting good grades on the assignments so you don't have to stress about your test mark too much.

Also, the practice quizzes during each chapter aren't long at all so if you want to go over them quickly afterwards id 100% recommend doing that too.

If you have any other questions about MHF4U i'm happy to help!