Need help implementing HideSeek to my project

Hi there,
Sorry if this is a recurring post, which it probably is…

I am trying to implement “HideSeek.js” in a project I am working on, but can’t get it to work…
I tried pasting and editing codes for the past 2 hours and as I have little to no coding experience, it is kind of irritating to say the least.

How would I go about doing this?

I have a list of visible collection items, and I want to have an input field which live filters them as the field is being typed in.

I tried following the steps in:

But after going to document settings and including jQuery in my document footer, I got lost…

Help is highly appreciated,
Thanks ahead.

Any response is welcome! Still trying to do that after 4 days :frowning: