Welcome to our forum.
I would suggest having a look around on our site, seeing what threads call to you, and posting your questions as they come to your mind. There is a lot of good info here, and a lot of opportunity to get the support that you need.
There is a "Life stories and blogs
" board that contains many people's personal stories, how they've handled polyamory and made it work. Also you can do a search and tag search, to help you find specific topics.
You can ask a partner to try a more open lifestyle with you, but you can't make the choice for them; they have to decide. I'm sorry about the difficulty you've had with that.
A post (from Poly Percs) that might be helpful: http://polyamoryonline.org/smf/index...sg9230#msg9230
Communication is the most important thing; always keep working on it. I hope you'll find this site helpful.