I graduated in 2023 - the course structure has since changed from a 3 year BA to a 4 year master's but from the looks of things the experience is still broadly the same! So some of the specifics of my experience might be different to how it is now but it's not a million miles away.
In first year you will study a mix of psychology, statistics and neurophysiology, and have tutorials for all of these that will be associated with problem sheets or essays. You'll have a few lectures a week, for me the number varied week to week but was usually around 3-7 if I remember right. The psychology module was a good intro to key areas like developmental, social, biopsychology, perception, cognitive psychology, I found it very accessible having not done the A level. My statistics course was mainly about learning calculations and theory by hand in first year but I heard from freshers on the new course there's a lot of statistics coding involved now, think they were using Python. Neurophys can be a challenge if you haven't done A-level biology, when I did it some weeks they'd just drop us in a second year medicine lecture which was a bit overwhelming but basically nobody fails it so you get there in the end.
In second year you do the core topics that you need for BPS accreditation, plus more experimental design and stats stuff. I had 7 lectures every week, usually 2 tutorials, and a practical every week. There is a strong focus on psychology as an experimental science as the name suggests so a lot of the teaching is focused on critically engaging with research, reading journal articles and learning about how to design experiments and analyse data.
In third year you can choose some advanced options and a research project, and you will also do some practicals. Advanced options change each year depending on which academics are offering modules and will usually focus on their specialties. This is pretty great if you find one that matches with your interest as it is both a chance to learn in more depth but also to network with leaders in the field. If you do a research project that is a chance to get hands on research experience, it can be very time consuming but is extremely useful experience and usually enjoyable too.
In 4th year I believe you do an extended research project and some extra skills training. I don't know much about this I'm afraid as I didn't do it.
In terms of assessment, you would have exams each year, first year is more of a progression exam while second and third year count towards your degree. Your second and third year lab reports and research projects (plus your 4th year stuff which sounds more coursework based) would also count towards your degree. There are also usually informal mock exams at the start of each term set by your college called 'collections' based on the previous term's work. The psychology exam structure is pretty nice imo as a lot of subjects at Oxford examine the whole degree in one go at the end of third year, while in psychology it's a bit more broken up and manageable.
I found the workload to be high but always manageable, I always had time for a few weeks off in the vacations around collections revision as well. I got my work done on weekdays and took weekends off, and had plenty of time for my hobbies/uni societies/downtime. The professors and tutors are all very nice and supportive. I had a great time studying EP and I'd definitely recommend it especially if you're interested in further study in Psychology (e.g. a PhD or clinical doctorate). The level of research training in particular that you get is something I don't think you'd get in many other places and I found this very useful applying for PhDs.
If you have any specific questions feel free to ask, if anyone else is currently studying EP please do add to this/correct me if stuff has changed since I left!