How do i make a data pack?

It depends on what you want the datapack to do! You'll want to look into what the terms mean if you're unfamiliar with them but there's a bunch of resources out there that can make things easier.
This tool helped me with predicates: https://misode.github.io/predicate/
Also if you're not sure if your json syntax is correct, this helps you check it: https://jsoneditoronline.org/
On the minecraft wiki there's a page too that might help you get started- https://minecraft.gamepedia.com/Tutorials/Creating_a_data_pack
Hope this helps!

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