I'm looking to get out there, and experiment with film.
Think some about what you really want to learn. Most people like the cameras that they began with or are familiar with, so they recommend them (I'm the same). It doesn't matter too much which camera you start with, if you are not too overshadowed or lost in that. But OK, you still have a legitimate question....although I don't think it is adequately qualified yet.
I say start with the simplest thing you can, but the camera has to be relavent to the things you want to learn. If you want to explore a sequence of photographic events on a piece of celluloid in a very intrinsic way then almost anything is OK as long as it isn't giving complexity and sophistication that is non useful.
Sadly (apologies to those that love Scoopic), the fact that you can't change lenses with Scoopic means that it is a sort of dead end or cul de sac. Choosing a lens and perhaps trying to adapt something unusual is crucial to the core of most exploration of photography.
To cut this short, without you having put yourself at risk by telling us more explicitly what you are looking for, I will spin the bottle and guess the most useful camera.....
Bolex, hopefully a later reflex model, with primes. You don't need 400' mags, or a camera that can accept them.
The best thing one can do is to ignore the myth of recording human action (or fictional constructions of that) in a literal way. Double ditto to the myth of recording human action with sync sound. Instead, consider each frame as a photograph, capable of great potency, and a succession of these is the physical, expressed essence of cinematography.