Button - Breaking animation and start First Person

Hello,
I created architectural presentation in UE4. Project is very simple, consist only of first person character and animation matinee option. I created one level with my architectural model, which starts with menu (consist of buttons: “Free look”, “animation” - already run on background, “exit”). My problem is, that I can’t create reference from my button “Free look” to first person character with breaking already running animation in background).
Can you help me?

My scripts:
Level blueprint
http://postimg.org/image/abklnwfdb/
Menu blueprint
http://postimg.org/image/brw461ia7/
Menu looks like this:
http://postimg.org/image/ma0tlzgfx/

Thanks!

and is there a possibility to place external weblink under the button in menu?

still need help…