Hi and welcome to Mini2
Where in Brussels are you?
I live in Antwerp.
If you fancy meeting a couple of guys, we have a meeting the 15th february in Liege.
About racing then.
Like M.J.J. said that's the info.
For those activities you need a license

Otherwise you go for some speeding on the motorway, but then don't get caught by the police (like little old me)
I do know that a couple of UK drivers are planning to come over in spring to go for a drive on the german Nurburgring.