My suggestion is rather down-to-earth. Before installing and downloading, you can play and experiment with the characters that come with P6. Getting to know the app itself a bit. For example how to pose, the effects of IK, the effetcs of light on your character, adding a background, creating a scene,...
Then attack the materials room, and finally start with the extra characters (that you can already download).

Really: you can drown your enthusiasm in the chaos of too many options. Better take it step by step. A few weeks of basics will save you many weeks of problems later.