IF this is your first grow. I would not get to fancy. It is fine to use a 80% soil / 20% perlite mix.

I also would stay away from the coco.. Many peopel have had over watering problems using the coco...

love

perlite is KEY!!! You may also want to put a 1/2 inch layer of perlite on the bottom of your POT as well.. This will help with drainage.

love