Welcome to our forum.
You might consider doing a tag search for "communication," as it's often the key component of a successful poly relationship. Sometimes good/plentiful communication can prevent drama. There's also a good book you can read: "Opening Up
As you look at various threads on this site, specific thoughts, questions, and concerns may come to your mind. Just post and let us know about those things and you can learn more through interaction.
Glad you could join us.