Is there any tips on how to get a 1st, amount of time to spend studying,
average grades on assignments over the year etc?
You'll be given your course handbook that explains the marking system for allocation of classes of degrees. It's complex but don't unduly worry about that. Spend the first year getting into good studying habits - attend lectures and seminars, do your reading, work and re-work your assignments, make sure you get them in on time-talk to staff and other students about what's expected, find your way around the library, e books, staff resources provided, and enjoy it. Ultimately, you can't get a first unless you really enjoy what you're doing.
Flirt with your lecturers so they can't resist giving you a first.
Pre-read before lectures so you actually understand. That would have made last year a whole lot easier...
You need a 70% average on all work which counts toward your final mark either for the year or for the overall degree. All you need to pass is 45%.
You work needs to be unique and original such as presenting new ideas, opinions and analysis of what you are studying.
NOT regurgitate what you read in a text book and change it into your own words when writing essays.