How do I implement a forward dive move?

Hi, I'm trying to work on a 2D platformer and I'm trying to implement a forward diving type move like in Super Mario Odyssey and A Hat in Time where the character dives forward at a set speed at the press of a button but I don't know how to do the movement. I could really use some help

I'm using the Platform behavior for my character and I want him to make a dive forward with a little hop at the beginning.

Thanks in advance!

Here's my go at it, may not be the most efficient way, but it works.

https://drive.google.com/open?id=1yy-8A37Phmp8guKd-5fHQ4dFsKeH5bsu

Something to add.

You should use 'state management' especially in regards to animations and/or special moves.

I.e, "idle", "attacking", states, specifically a text instance variable or global one. Set the state to "dive" when the move is executed and disallow any other animations or types of actions if that state is enabled. Afterwards, set it to idle once the animation is finished.