Most fellowship don't have size restrictions or anything and most will take you if they have an opening and you ask. I found my fellowship when they contacted me, but there are other ways. For instance, watch the trade board and you will see players near you. If they are there a lot send them a msg thanking them for whatever trades they picked up of yours. Do that for a few and once you find someone who responds you begin to build a relationship -- which is the core of a good fellowship. Maybe you and that person form your own, or maybe you join there fellowship. The point is, to find a fellowship you can wait for them to come to you (it was over a year for me), or you can reach out to your trading neighbors via the mail system.
AJ