Making beizure's projectile maintain its' velocity even after the beizure has ended

Hey, I’m currently making a projectile using beizure, it is working well so far, but I want the projectile to maintain its speed / trajectory after the beizure’s loop has ended (Or when it has reached its initial target).
image

The image above demonstrates what I’m trying to convey. In my beizure loop, its like what would normally do it, setting the position of the projectile every frame or so.

Any help is profusely appreciated!

The direction and velocity is specified by the current point on the curve minus the position at the previous frame.

I got the getting the direction section resolved, but I’m unsure how to accurately calculate the velocity of the projectile just based off of the direction of 2 adjacent nodes.