A lot depends on what type of studio photography you want to explore..
Could be portrait, figure, nude................to extreme (was it called 'continental'?)...
Stress, complexity and costs increase as you go from portrait to the next 'step', while the scope for sharing photos reduces (just imagine during the days of film what sort of conversations you have with the lab.)
Getting models for portrait or figure (I mean model stilled clothed) pretty straightforward as other responders have suggested. Getting friends or colleagues to pose for portraits is easier than you think.
I went through a phase 20 years ago when visits to photography studies was a regular club event but I haven't done it in over 15 years now, it was fun at the time. I would go to Worksop (is it still there?) and Keranda in King's Lynn.
Good luck with it, let's see some images when you start.