i don't have answers, as i've not been through the experience myself.
But i wanted to say i think you have amazing courage for trying and that, if it's like most marriages, things always seem to work out, if you give these things, yourself and anyone else involved, time - at least that is how it was in my marriage, which was not plural, but in which we did practice submitting unto the Husband (may He rest in peace) as to the Lord. And i can't exactly say i'm not in a plural marriage as i'm LDS - but a Christian first and i don't have a testimony of every single thing some leader in the Church may say, in fact i was going to leave that faith before i ended up married to a Priest/Elder in it. But in our someone schizoid view of plural marriage in that flavor (sect) of Mormon, one can't be in a plural marriage on earth - unless one is divorced and remains sealed to the woman he divorces and then gets sealed to someone else, without a cancellation of sealing taking place- however, my late Husband had a wife who died before He joined the Church and i gave permission for them to be "sealed for eternity" also - so i should say i don't practice plural marriage in this life. And if that confuses you, don't yell at me please, it confuses me more. i remain in that church as i have a strong conviction and testimony that, for whatever reason, my Heavenly Father/God wants me to stay there and so does my late Husband. So unless i get other direction, i'm there for the duration; however, i try to put Jesus Christ before my denomination - i hope that makes it okay for me to be on here and sharing.
j/L "Granny" Matrika /Rolling Buffalo Woman
p s yes, i am Native American Indian - the Sokoki tribe, which is, by definition a Christian (not-LDS specific, more "Born-Again" believers) Indian Tribe, as it stated on their web site when we could afford to have one. And a Navajo (Dine) friend told me that in the South Western American Indian Tribes Plural marriage was and is common.
i found that interesting - oh, i'm rambling again. Just call me rambling rose or the you-know-what of babbling on - and on and on and on! (GRIN)!
But again i admire the courage of any woman consensually in a plural marriage, as an adult!