For what it's worth, I'm a 1700 hour OH-58 guy and the last thing I want to do is try and learn a new Army airframe, unit, and mission while also trying to start an airline career. It takes a lot of focus and work to be a successful Army Aviator and while I haven't been through airline training, I assume it's an all-in type of commitment while you learn the ropes your first years flying jets/turboprops. That's a lot to juggle if you want to excel at both.
That said, I'm sure there are plenty of guys who do both rotary guard and airline flying who can better illuminate the path ahead for you.