Hi there,
I think this is something a lot of people in first year struggle with! I'd recommend making a pros and cons list to help decide which things are the most important to you.
In my first year I shared a kitchen with 6 others but had my own en-suite. I expected sharing a kitchen to be a lot worse than it was! Although sometimes it got messy and it's hard to juggle when to cook with limited ovens etc, overall it allowed me to connect with my flatmates a lot more and we ended up spending a lot of our uni time communally in the kitchen!
I can't personally comment on shared bathrooms, however they do get cleaned regularly by university cleaners and they're simply just bathrooms! You'll soon get used to everyone's routines and get into the habit of taking your products to the bathrooms etc so I don't think this will affect your experience at all.
I don't think getting a studio will limit your social experiences, however you may have to put in a bit more effort to build friendships with people on your course or at socials. If you think having your own space, and having the access to additional facilities will benefit your overall experience then definitely go for the studio - do what's right for you, not what others think!
Hope this helps and best of luck at university! 🙂