There is no good answer to this. Everybody needs different tools and Avastar is just one of them. What you exactly will do with Avastar is entirely in your own hands. However below you may find some information which could answer this question for you.
We only provide a very limited set of Videos for the Blender 2.79 Avastar release. These Videos are all embedded in the Reference Manual pages. The Avastar 2.80 Video production has not yet been started.
We are often asked what Avastar has that Blender does not already provide. The highlights in the next section tell briefly how Avastar competes to other tools. If you are interested in a detailed comparison, then please
Avastar integrates seamless into the Blender framework. We support the download of SL shapes to Blender as well as the upload of mesh characters to SL. and … fitted Mesh support, exact SL shape support, SL shape sliders, Accurate attachment modelling, extended checks on meshes before export.
SL compatible BVH retargeting, Export to .bvh and to .anim format. Auto FK and IK/FK controls for the standard SL Rig. Accurate animation of pose bones, attachments and collision volumes, experimental support of attachment weighting and full support of fitted Mesh (Collision Volume weighting) and many more Features …
Avastar for Blender 2.79 and 2.8
Avastar has been tested on Blender 2.79 and it is about to be released for Blender 2.8 (around april 2020). The Avastar-2.79 version should also work on older Blender versions, but we do not recommend to do that.The Avastar-2.8 version will not run on older Blender versions.
We have Release Notes for most of the published Avastar versions.
Avastar for Blender < 2.70
For those who have to use Blender 2.69 or older (for whichever reason), you still can get the previous Avastar release from the_archive folder in your download page1.
1: While you always can get an anonymous temporary link to the most current product version, you need to create an account and register your download page when you want to get access to the_archive. So you actually might want to