Creating animations with Construct bones is very tough, especially if you don't know animation in general. Not saying you don't know how to animate, but even for me (I'm an animator), it's one of the most cumbersome animation tools I've ever used.
One thing that helped me was creating very quick sketches of the animation in Photoshop, then importing that into Construct and using it as a template for the bone animation. It really helps to plan out what you want in advance.
Hope that helps a little.