Yes. Don't bring a computer or at least open it in lectures. If you're dyslexic use a recorder instead.
The initial few months will be easy as. Everything is about catching people up and that. It'll pick up towards the end of the year, and depending on the course you do get harder in second.
Be aware of burnout, though, particularly in winter where you wake up when it's dark and get let out when it's dark. Schedule a trip home then to recharge- I always have a weekend back in February.
That's assuming you're in halls, of course. I can't remember if got said you're staying at home or not. If you are, be prepared to get a few nights where you crash round someone's as you attend events and stuff.
Go join societies, but identify when your workload is going to get tough and reduce attendance as appropriate. This is the ideal time to learn a new sport (yay archery) even if you're not sporty. Approach the "traditional geek" societies with caution- battle reenactment and Larp peeps should actually be well adjusted but spend a fair amount of money. Manga and animie SOCs can be populated by shut-ins and creepy people (though apparently Birmingham's isn't that bad, so turn up give it a spin and drop it fast if you don't like it)
Yeah. The bottom line is that you'll never be able to try everything, but in first year you can try quite a lot. Don't be afraid to randomly turn up a few weeks in to try new things either.
And I shall go Softly into the Night Taking my Dreams As will You