All you have to do is to click on "WGT Community" and select country clubs. You can then browse all the clubs and then if you find one you want to join - if memory serves me right - there is a button to click to join. A request is automatically sent to the country club organisor who will add you as a member. It costs 50 credits to join I think.
Perhaps consider "Play for Fun Country Club"? [No harm in promoting the one I'm in ;)]