I'm on my second round of uni, already have an arts degree and now doing a science one.
The course I'm doing now is known for being incredibly time and labour intensive, and has one of the highest drop out rates as a result.
For me, the first 2 months were incredibly difficult. I was really struggling to handle the stress and find the time to do my coursework, study for exams and keep my mental health in check. It's only in the last couple of weeks that I've felt more on top of things, so do prepare for an adjustment period and do remember that you'll settle and it'll get better!
My best advice -
1. Create a timetable. Look at your class timetable, and plan around it. When you'll eat, when you'll do coursework, when you'll study. Take each hurdle at a time, if you have 3 pieces of work in one semester? Don't panic. Just focus on one at a time, you'll find that by the time you're done with the second one you'll wonder what you worried about. Creating a timetable will allow you to use your time effectively, but be kind to yourself! Allow yourself breaks and deviations if you need them.
2. Study outside of your course. Uni is very much focused around self directed study. If you don't understand something, allocate some extra time to research/study it and your brain will thank you later.
3. Romanticise your study time. Make it cosy, comfy, and something you (at least somewhat) enjoy doing. Take yourself to a nice coffee shop, study with friends, or even just put a 'study with me' video on in the background and make yourself a nice drink. Set yourself up a desk space which looks nice and you enjoy sitting at, a mood lamp and a few plants can work wonders for the serotonin.
4. Remember the fact that you don't have to stay. If you hate it, if you're really struggling, there is absolutely no shame in dropping out and doing something else. If you feel trapped in something, it's going to be much harder to enjoy it and make it worthwhile.