Should have a voice
I think this is a great idea and I would make only two changes. I don't think that there should be any non-voting members of the House, all delegates should have a vote.
And I think that every Amerindian tribe recognized by the U.S. government should have a member in the U.S. House.
You should only get Senators if you are a state, but all tribes and protectorates should have an active voice in Congress.