How to make a dash mechanic?

Help Requests
1

I just want to make a short air dash mechanic, that can only be used in the air.

2

You know how in the run and jump bundle, you cant jump till you hit the ground? Maybe have it so when you hit jump button it opens a switch thing and you can hit the dash button, then when player hits the ground they cant hit the dash button anymore?

3

Ill try this, It sounds like it should work

4

but where do I get the switch block?