Realistic weapon attack/swing in vanilla Minecraft

Hey guys! I was playing around with in-game first person animations. This idea was inspired by MrBloxz. I thought that it will be cool if I give it a shot.
The difference is that I used melee weapon while his was guns/range weapon.

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[VisageGaming]

Sorry about the dimensions, I screwed it up.

[pineapplepirate]

Dude, I've been literally finding this type of datapack for years. It's just that the vanilla PvP isn't that interesting so im glad you finally did this

[TheCrumblewood]

Can you make a tutorial on how to do this?