Welcome to our forum.
I think I'd recommend starting with our Golden Nuggets board
, which teaches you the basics of polyamory. From there, explore various and sundry of our boards and threads, according to what calls to you. Post any thoughts, questions, experiences, or concerns you may wish to share. In time, you'll have a dialog going with several good members who can share their perspectives and offer support.
In general, communication is your best friend -- especially thorough, honest, considerate communication. You might even want to do a search or tag search for the word "communication."
Good luck; I hope you have a good experience here!