If you get mixed vibes, or feel somewhat uncomfortable and unsure about a group or individual, delay getting more deeply involved until you can identify where your feelings are coming from and what they are trying to tell you. Meditate on your feelings. Seek out your inner guidance and follow its direction always. Second, beware of those who try to convince you that theirs is the ONLY proper way of development. Such narrow-minded thinking reflects a lack of spiritual wisdom as well as an unhealthy perspective of reality.
Groups vary in size, structure, methods of working, cultural roots, and many other ways.
You should try to connect with the path or paths that seem to harmonize most closely with your own vibrations, needs, and interests. Beware of those who are overly quick to initiate you and make you part of their path or group. This is often a sign that they want to use you, your money, or your energy to feed their own power trips and ego games. Getting involved with them can bring you much trouble. Beware, too, of those who flatter you and feed your ego more than your Spirit.