Youll be fine, yes there are periods of intensity but these are typically one or two weeks per semester (mostly in years 3 &4), additionally most of this is avoidable with good planning but most people prioritize student life until assignments become unavoidable, you will generally have way too much free time. You certainly will be able to have a social life, do volunteer roles, participate in societies & do your academic work, yes occasionally you’ll make compromises but generally life will be good.
On the whole student life is a pretty easy going fun few years, even for engineers, medics & whatever other courses you may imagine.
The reality is a lot of student night life is mid week & universities start at 9am, so what a lot of students find is they have one or two days per week where they are having to survive a 2hr 9am lecture with a hangover on 3 hours sleep, this is just part of the student experience though.