I am a mixed male with thick, coarse, dry, wavy hair. How can I get softer, straighter more managable hair?

I'm looking to buy a good organic shampoo that wont strip my hair of all its oils and a good conditioner as well as a good leave in conditioner. Also, how often should I wash my hair with conditioner and how often with shampoo? Is there any products that can help make my hair straighter as well? I'm tired of it being wavy and unmanageable.