Hi ralarok,
If you didn't get your templates working yet, here's some suggestions that will hopefully help. One thing to keep in mind, if you're using them, you don't have to use the placeholder views to create a template. They can come later. From scratch here's what I would do to first get up and running:
1. Start Fusion > Expand your username menu (upper right) > Preferences
2. Under General, click on Drawing
3. If you always use a certain standard/units, change Inherit from Design for both of these to the one you want
4. Check the override defaults box and make any changes you want below > OK
5. File > New Drawing Template (this will use all the settings you just specified in Properties)
6. Add Notes, an image to the titleblock (double-click the titleblock to do this), more sheets if you want with different sizes, and adjust any other Annotation or Sheet Settings using the menus at the bottom of the screen.
7. File > Save
8. Now when you create a new drawing, instead of "From Scratch", browse to and select your template.

If you have created placeholder views, these have Representations for each "asset" type, assembly, component, flat pattern, etc. If your design does not contain this type of asset, the placeholder views won't be applied.
You can also open/edit your template at any time and that will be applied for subsequent drawings you create with it. So I'd get things up and running first with the right units, font, precision, etc., then expand from there.
Please let me know how it goes.
Thanks,
Chris