Worrying about your tendency to worry is the sign of a champion worrier!
I know this is a simplistic response, but I really think you guys are going to be ok.
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.