Character with two cameras: set view target with blend between both

Hi!

I’ve added a camera to the third person character, from the third person template, to have a first person view.

My goal is make a smooth transition from the third person camera to the first person camera but I don’t know how.

I have tried this:

But, when the game stars I see through the first person camera but without any transition, immediately.

How can I do it?

Thanks!