Well, before you choose to apply for a coven you may want to consider is it the right coven for you personally.
For example, some questions you may want to ask yourself are:
'Do I want a coven with lots of members or not too crowded?' (From my experience, smaller covens tend to be closer.)
'Do I like the sound of this coven, and can I abide by their rules easily?'
'What can they offer me and what can I offer them? Do I like what they stand for and teach?'
Along with a few others. As soon as I found my current coven, Second Sight, I found it was just right for me. I'm sure the same thing will happen with you. :)
To find the list of covens, click on the 'Groups' tab above. The covens are in order of member size, the ones with the highest amount of members being on top. Smaller covens are closer to the bottom, still in size order.
Then, click on a coven. After reading their rules and asking yourself the questions above, if you find it suits you, click 'Apply' near the top of that coven's page.
Hope this helped.