Cursor not showing up + Shiftlocked completely with roblox pistol

So, I used this Roblox made pistol model in my game, however my cursor is gone and my shiftlocked is stuck forever, the pistol scripts are complicated + I am fresh to scripting, wondering if someone has looked into it and has fixed it, ty.

The screenshot
image

The gun
https://create.roblox.com/marketplace/asset/4842197274/Pistol?pageNumber=1&pagePosition=0&keyword=Pistol

I believe there is some tutorials on YouTube on how to disable the shift lock in the Roblox free model guns.

Can I have the youtube link?I cant seem to find it.