Druid groups

I've been looking at the various druid groups to see which ones may be a match for me.  I think that I'm looking for a group which 1) offers a structured curriculum, 2) is open to people of all religions, rather than being specifically pagan, and 3) is not focused on the supernatural, and has something to offer for naturalistic druids.  The criteria lead me to:

• OBOD
• AODA
• The New Order of Druids 

 As a supplement to joining one of these groups, I may be interested in discussion forums, such as:

• The Druid Network
• Caer Abred - for naturalist druids
• Druid Village
• Hedge Druid Network 

There are also some smaller groups that sound appealing:

• The Druid Order of the Three Realms
• The World Order of Druids

I think that I am not interested in

  Pagan groups

• ADF
• Keltria

  Avalon groups

• Avalon Druid Order
• The Sisterhood of Avalon

 or these groups

• RDNA - unstructured,
• Order of the Mithril Star - related to RDNA, inspired by Stranger in a Stranger Land
• The British Druid Order