Hi Andre,
Could you provide a link to your (don’t forget to Pack Resources!) .blend file (via Dropbox. Googledrive, or so)?
These Geometry Nodes setups are very hard to troubleshoot from screenshots, let alone from only text descriptions. (Also, it’s been a few years since I did this Course.)
Oh, and please mention the Blender Version you are using. That’ll save me some time.
