Hiya fairydust, and welcome
Somewhere around here there is a glossary. If your two men are going to be sexual partners, that's a triad. If it's only them having sex with you, that's a vee. If one of them got another partner, that would be an N. Oh, it complicates exponentially!
It's not monogamous whilst in poly, it's fidelitous. Polyfidelitous, I've heard.
Take a look around these forums. You can search by keywords, or there are tags, you can click on anything in the tag cloud and find out more. Many tips and how-to do suggestions.