Nutty /Leadfinger ,
I don't know how to go about the Membership "thing"- I wouldn't mind posting a few songs to Mudcat.
The rest of you - keep playing how,and and using whatever Chords /Keys and method suits you.
If the listener happens to like it - that's a bonus , primarily, be happy and content in your music making - it's a wonderful gift you have been given.
Thanks for your offer Breezy - one day maybe , one day!!.