My only suggestion would be to do a lot of reading here and get your wife to join you. There is a large population of mono people on here doing their best to understand us crazy people called polyamorists
... she would be very welcome and in good company. Check out threads on "mono poly" "foundations" "lessons" "triads" "vees" and anything else that comes up along the way... taking your time is really respectful to her, but getting her engaged with the process will move her into acceptance... very important
good luck and welcome.