Hi and welcome!
I have the B pro and Union bindings. If it's your first season, I'd steer you away from the B pro honestly. It's on the stiffer side, likes speed, and might try to beat ya up a bit. It is more of an intermediate-advanced board than a beginner-intermediate board. Great board and I love mine, but not the best choice for a beginner imo. Btw it is a twin.
Varza's suggestion of the Lunatique is a good one. I've never ridden one but it seems softer and perhaps more forgiving than the B pro. It might fit more of what you're looking for. Also, what conditions do you ride? That factors in as well.
I've been happy with my Union bindings, so I'd definitely recommend them.