Welcome. Good to hear you're taking the journey of self discovery. :) The one thing I will say at the moment in particular is that you should be careful with use of the word "polygamy". The word polygamy technically means "multiple marriage" whereas polygyny means multiple wives and polyandry means multiple husbands. However because of dominant cultural trends, "polygamy" is usually used socially to mean "multiple wives". This form of polygamy has been unpopular in mainstream culture here in the states for several generations and has been played up in mainstream media a lot in recent years, generally highlighting the extreme cases that push everyone's buttons because the producers know that's what generates ratings. So amongst the broader poly(amorous) community what you'll find is that there's generally kind of a "polygamists give us a bad name" vibe, although it varies from people not liking the one-sided Utah Mormon style polygamy in which only multiple wives are supported (along with other institutionalized gender roles), to people being more annoyed with the media coverage. So make sure if you're going to talk with people about polygamy that you really are talking about multiple marriages and not just multiple relationships.

Also I myself have identified as bi (or moreover pansexual or sapiosexual) for several years. Don't be too eager to push yourself to have those experiences either -- you're likely better off waiting until you feel reasonably comfortable with someone to experiment with them, rather than jumping in and finding that the other person is just using you.