hi man! i use a slightly different pot than the airpots that you mean i think. mine are rigid plastic, they work amazingly well tho. i mix about 5% perlite in as coco as a medium dries pretty quickly, which is again another bonus roots love the air in coco. ive only used the fine ground stuff tho i have seen great resuts with the next size up which is like 1cm squares.
no real tips per say, other than give your girls at least a week in the final pot before you flip them. i re use my coco, have been for nearly a year, and when your done just bag it up still a little damp so the micro life you've built up is re usable too. canna nutes are pretty much designed for coco, i would recommend getting the rhizotonic and cannazyme to help the process along. any questions just shout fella!