How to uncancollide a character?

So I need to uncancollide my character but I cannot do that. I read this https://developer.roblox.com/en-us/articles/Collision-Filtering but I have been having issues with understanding the code. Please help!

Try searching the devhub before posting questions that can easily be solved by a bit of search:
https://developer.roblox.com/en-us/articles/Player-Player-Collisions

Heres are the files / things for your question!

Model: here

YT Tutorial: here

Credits to RIPPER0NI For Video and model.