How can I fix my camera switcher?

Explanation:

When im tapping TAB my camera slowly changes from camera position 1 to camera position 2

I also want to make animation when changing cameras faster

How can I fix this and improve my code?

Im a newbie and probably wont understand some things

Theres a character controller code: godot player script - Pastebin.com

Theres a video showcasing scene: video