Mouse moving blueprint for the 2d side scroller template

Hello I am a beginner in this “domain” so…I was wondering if you could help me
I want to create a 2d survival side scroller game (like This war of mine ) and I don’t know where to start…I was curious about how to create a blueprint for the mouse movement of the characters using the mouse (it s like an RTS system applied on the 2d side scroller template )
Thank You in advance