You could probably make a variable for when the wg animation starts, and then make it so when it's a certain number the player can just tap A/B/ect. to get through it faster. If they don't press it at all then the animation finishes its whole time.
The collision thing is very tough, IIRC the best answer without any plugins is to make the enemy actor change a variable you have for hp on touch, and then immediately after deactivate the actor
as far as gb studio goes there is a reddit... but its currently blacked out due to protest figures eh? however on youtube there is a bloke called Robert Doman who does a buncha tutorials... some of them are old but might still work if not might be able to ask them directly on how to do something. hope some of this was helpful.
