Guten Tag, Bernhard,
I'm not available to provide you with customized training. However, I will point you to some resources.
The first is Articulate's UserGuide for Storyline 3. It mostly covers basic information. But parts might still be helpful.
https://community.articulate.com/series/storyline-3
Next, I'll point you to my page on the Forum. Depending on your needs, you might find some of my "TIPS" posts helpful. I've answered a lot of questions here. While doing that, I created many files that demonstrate how to accomplish complex tasks. Those files also include explanations. I use Storyline 3, so you should be able to open every demo file, and the instructions will apply to SL3.
https://community.articulate.com/users/JudyNollet
Finally, here's the link to all the documentation about Articulate 360:
https://community.articulate.com/articles/tutorials-and-documentation
Best wishes!
