Shampoo is like soap. clarifying just means cleaning.
Conditioners are like lotion. It softens.
If you use a strong soap on your skin without lotion, it will dry out. Which is why conditioners are so important.
You can put the conditioner on, then rinse it off. The best thing to do is to let it sit for a few minutes while you are washing your body, then rinsing everything off at once.
Then after depending on your hair type you can put an oil, butter or gel to seal in the moisture. The general rule is if you have straight/fine hair use lighter/thinner products, if your hair is thicker/more textured you can use heavier/thicker products.