Hii! I'm a second year theatre and performance design student and my boyfriend is a second theatre tech so pretty good for this question haha. I personally really enjoy the course, there's a mix of stuff we do which is always good fun. You absolutely do do some self directed stuff, but you definitely get a lot of instruction! So in my first year I would learn how to do things from the tutors and then could go on to use what they'd taught me to do things on my own? So I'd ask "oh what's the best way to do xyz" and then from what they'd shown me I could then use that to make my own pieces. They absolutely do do prop making in the tech course too, in fact I'm fairly sure in first year tech you have an entire class just on prop making, so it all really depends on what else you wanna do - if you do design you obviously also have to do set and costume, if you do tech you gotta try out construction and stage management for example. Personally I'm not someone who goes out clubbing but I do have plenty of time for going to shows/concerts, hanging out with my friends, spending time doing art etc. There will definitely be times of year that are crazy busy and you don't have much free time, but after that particularly busy module is over it should let up.
They should be pretty alright with it if you wanna do design in film, they even send us placement opportunities for film sets so we can have a look if we wanna study it! It obviously works slightly differently to design for theatre because you have to consider different things but it's not a bad thing at all

lemme know if you have any other questions