You have to join a clan not beeing added by someone else (indeed, you need alowance of becoming a member), but noone will do that for you. Participating in a clan also means a minimum of activity. Activity means visiting clan forums, trainings, take part in leagues (playing vs other clans etc.) . It's fun...so don't be afraid. B!G isn't that strict I think.
well, jan don't worry i've been leading the clan(with alot of help of course) for 2 years, exactly becuse of what you said, we have "Clan Treinees" that are on a probation period for 1 month, after that we decide if they are good enough to play in battles, we don't kick them if they are not good, we just don't ask them to play battles, and they don't get promoted, trainings on the other hand....missing 3 trainings in a row will get you kicked out yes, but you just have to make up a good excuse to get out of those

. Visiting the forums is not a necessity but it is highly recomended, since that's where the training dates are posted

. This approach allows us to add random people into the clan, regardless of where they have learned about it or how good they are. We believe that clans are for everybody.......besides it's not about winning, it's about playing.