Basically, paganism is Earth-centered spirituality in which you can believe whatever you want. You can be a solitary, like myself, and believe what calls to you, or join a coven and believe what they believe. Either way, there is a lot of religious freedom, and you are expected to find your own way. You can practice witchcraft or not. You can worship multiple gods and goddesses, one god or goddess, or none. You can be who you want to be with this religion.
A lot of people call it blasphemous or silly to believe what you want, but it's actually freer. I personally believe that there is one Spirit who wants us to follow our own spiritual paths to reach Him. He has an ebb and flow, and nature is connected to Him. So we worship Him and hold sacred nature. But those are just my beliefs. We must all find our own.