It is possible, but as said it’s not that easy on blueprints, it’s might be little too complex for blueprint, in C++ it would look a lit cleaner and actually simpler. On simple though, you could have 2 movement system, one for normal and one for cover, i think good shortcut would be utilizing crouch system that is already build in, only thing you would need to do is from 0 would be walk along the wall movement.
There lack of tutorials as engine out just few mouths and most people still discover it’s depths, maybe somebody will do such tutorial later… maybe somebody will release out of the box cover system to marketplace, who knows
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