Where I live poly is also not talked about a lot. It's even shunned upon, sadly.
When Peaches first brought up the topic and talked about it, after I got over the initial fear of not being ok with it when it came to actually dating someone else, we educated ourselfs.
This forum itself is full of valuable wisdom on the subject.
Threads like these:
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Will not only bring you a lot of information on themselfs, but direct you to sites, books and other usefull threads.
Getting to know precisely what we were agreeing to do really helped me and Peaches to avoid a lot of common bumps and problems when I actually started dating someone else.
My advise is read, read, read, ask, ask and ask again. o/