Goal is to make Tree which has animated twigs. This workflow is correct ?

First I Click on -> Create G3 Freebone actor,
Then I search my tree image and add bones to it, so I can animate.

Question 1: Every animation I make in CTA, is forced to be at Content manager -> Characters section ? 
Question 2: Prop animations is meant to be done in 2nd party softwares like Adobe Flash / Draw Plus ?

Help appreciated

0. Your workflow is correct.
1. I don't know now.
2. Absolutly not. You can create and animate props in CTA3. You have to draw them first in some image editor, but all animations can be done in CTA3.