You have to favorite this guide or it wont show up when you try to select it when selecting featured showcase
Profile -> Edit Profile -> Featured Showcase
Select "Favorite Guide" -> Then select this guide -> Scroll down and press save

Enjoy <3

(You need to be at least steam level 10 to add a showcase your profile. You also get another showcase every 10 steam levels. You can change these any time.)

Also check out my other guides that also are spinning audio that you can add to your profile:
https://psteamcommunity.yuanyoumao.com/id/oxtra3/myworkshopfiles/?section=guides