Own skin not showing up

Soooo I’m trying to start and I’m doing everything by the book. I copied an existing skin (Estuary) from /usr/share/kodi/addons/skin.estuary to my local kodi folder where other skins are also located. I gave the folder own name. I edited the addon.xml and changed the name and ID there accordingly.

However, that skin is still not showing up in Kodi in my list of skins after restarting Kodi. What undocumented part am I missing? What other parameters I have to change? What other files/folders I have to copy? Nobody else seems to have this problem since I couldn’t find anyone else struggling with this.

Thanks!