Hello Spax

I have been CrossFitting for two years now and the results are incredible.  My suggestion to you is to start immediately regardless of your current fitness level.  The beauty of CrossFit is that everything can be scaled to any fitness level, age, gender, etc.  There are plenty of ways to get started with minimal space - do some running, pushups, air squats, find a way to do box jumps (bench, steps,etc),  get a pull-up bar, the list goes on and on.  Here is a good article from the CrossFit main site that has a section on the "bare minimum" to do most CrossFit workouts:

http://www.crossfit.com/journal/library/cfjissue1_Sep02.pdf

Hope this helps.

Ken

Trust me nobody is too unfit for CrossFit.  I belong to CrossFit Thousand Oaks (http://crossfitthousandoaks.com/) and we have everyone from top notch athletes to people who can't do sit-ups.  The great thing about being part of a CrossFit gym (at least at our gym) is that everyone supports each other regardless of their fitness level.  And again I will emphasize the fact that everything can be scaled.  For example, we had a workout the other day that involved handstand pushups.  At our gym this exercise can be scaled as:

Elite: handstand pushups where head touches the floor
Experienced: handstand pushups where head touches plates
Intermediate: decline pushups with feet on a box
Beginner: regular pushups
No experience: incline pushups with hands on boxes

So no matter what the workout is there will always be a way to tweak it to fit your experience level.  Happy CrossFitting!