Ok, now I’m starting to understand also the compositing part in Blender and how to use it for VFX. Still a lot to learn and the result is not the most amazing. Lot of mistakes in the shooting (should not have a lot of sun shining down on the actors and the background, moving leaves not the best background, needed some shots without my daughters on so I could use the difference key and a lot more…), but I have got a lot of ideas how to make things better in the future.
Also did a test with my youngest daughter. Lifting some HEAVY weights :).