UNREAL 4 - How to push a charachter with BP?

Hi, i created a fish character, and i want to push it back once it hits the glass….i´m not using any physics at all, so i started using “Launch Character” and it does push it back… But, once it happens, character stay in the floor and move like turtles, it does affect it, also setting velocity makes them move slow, what can i do to create a push effect withouth afeting characters

Please help with BP pics if posible.