Hullo and welcome!
Your first task would be to look around and see what catches your interest. Maybe starting with what is polyamory and how it is different/similar to other forms of consensual non-monogamy. Getting to know the lingo can really open many doors, so check out the glossaries.
From how you've described your relationship, it seems you are mono looking to get involved in a vee with you as the secondary. So any of those might be a good tag search idea; mono/poly, vee, secondary/secondaries. Mono is a straight mono guy in a relationship with redpepper, who has been poly throughout the relationship. Check out his posts for ideas of what to expect.
Never fear, there is information and support available!
Me: bi female in my twenties