Aww, hang in there. Honestly, not every family *must* be super discrete or anything. Your extroverted personality will fit somewhere and the right family is out there for you. Not every man has to avoid public displays with his wives. Much of this has to do with the family, the situation, and even the geographic location. Small towns might mean more discretion whereas large urban areas in "trendy" cities mean the ability to be more open without the neighbors freaking out.
Not often talked about, but one aspect will depend on the degree of "religious" of your family as well. That is, if the women are dresses only, head covering, all acapella hymns... Wellll... They stand out anyway and so with polygamy that will up the ante. However, a more relaxed fairly blended into society family will not stand out so much anyway. Attending a tiny church means that you probably cannot attend church as a family. However, sitting in a large to mega church, nobody would notice really.
I also have considered this issue as I'm a bit of a livewire, very outgoing and transparent sort of person, so for me secrets and deception does not work well. Most people won't ask and as long as you don't go around saying "Hi, I'm Alice, I'm a polygamist", most people will tend to leave you alone and see what they want to see anyway.
It takes all kinds so do not let yourself try to change who YOU are... If it is meant to be, God will show you to the right family and it will be the perfect fit for you. That is all that matters. We all have our matches out there somewhere.
~Becca