Thanks a lot. I will check all that. Specially the one for non iPhone users, which is me.
But so I was right in my assumption that the easiest way is doing the shots in Blender instead of using UE?
These seem to be quite involved. Since this is for a cartoon, I might not need the perfection of motion capture or a video. I found some audio only based lip sync add ons which seem might do the job ok enough. What do yo think? Or can you recommend any other simpler solution than the above? Thanks again.