Hi bud.
As a BioBizz user myself, your question confuses me. The instructions how to use Coco-Mix are literally written on the bag.
Did you check the bag? Did you check their website?
If the bag/website doesn't state anything about preparation, then there is none needed. For example, BioBizz AllMix states (after you placed soil in a pot) to water the substrate at least 3 days before usage, so the microorganisms get activated and are ready to help your plant nourish. The only preparation you will undertake with Coco-Mix is your own making. Even then, the preparation for a seedling looks much different than the preparation for a plant that is 6 weeks old.
If you have the entire line of BioBizz organic fertilizers, did you read how and when to use and apply them? It doesn't seem you did.
Read the instructions on the bag. Read up on their website. Check the feeding recommendations BioBizz made. Then, if you still don't understand it, pm me and I can try to help you through what BioBizz is recommending.
Sorry for coming off a bit arrogant right now but it annoys me when people want a walkthrough when the answers were right under their nose the whole time.
Hope this helps, even just a little.