How Would I make a Smooth Transition from Standing to Crouching?

I have a light understanding of the timeline node, and so far, the best I can do with it is zoom in in the FPS template.
Can you help me figure out how I would use the timeline node for crouching and standing with the set up I have now? Thank you.

Why would you want to use the timeline node? Have a look at state machines, blendspaces in company with the animation blueprint instead!

Cheers!