I'm a little confused when they say to find your hair texture. Wash your hair and leave it to air dry product free. What does that mean?

The operative word is air as opposed to heat. A towel and comb has to be fine, but no hair dryer. The other answerers are away with the fairies.

The second one.  You can towel dry and comb.  Then just leave it alone and let it air dry.  Without a product or heat, your hair will dry in its "natural" state: straight, curly, wavy, frizzy, etc.   

It is the products that can smooth the hair cuticle and the heat that will alter the texture of your hair.

Wash the hair - rinse thoroughly.

DO NOT wring out your hair - this causes breaking and damage.

DO NOT rub your hair with a towel or any other cloth - this causes breaking and damage.

DO NOT comb or brush your hair while it is wet - this causes breaking and damage.

DO NOT put any "leave in" products on your hair during the shower or afterwards - "leave in" products change your hair's texture - so if you are trying to find your natural hair texture - skip using any other product.

DO NOT use a blow-dryer - it doesn't just dry away the water - it also dries away some of the hair's natural softness.  Hair that is blow dried too often may become course and heat damaged.  

Personally, when I am done with a shower, I wrap my hair in a towel for a few minutes (without rubbing it or wringing it).  The towel will soak up some of the water.  After a few minutes - I carefully take the towel off and let my hair air dry.  I have very naturally curly hair and this gives the best results for my hair.  

wash with shampoo and let it dry naturally. then u will see what sort of hair u have

Wash your hair and don't do anything else with it.  No towel, no comb, nothing.