how and where to start

[beginners questions]

hi guys, me and some friends really like the tricks you guys do, but i was wondering...how old where you when you first started to go for it ? I just turned 18yr, but I always loved to jump around, and always go futher and further and further and .... I dont really have a basic i think, but i do got the willing for it.
I live in belgium, but its really sad we dont have got any martial-art schools i know.
is it possible to learn it alone, or in group with friends?
with the help of you guys I would really feel better, and get better at it i think

ps: sry for the bad english, but its all i could do

[Rory]

Start off doing vertical spins, and jumping distances. That's what I did, then I eventually took it to running up walls and spinning horizontally over rails, and one thing leads to another.

[lachymac]

what do you mean by spinning horizontaly over rails?