How can I get gorgeous hair?

Currently, my scalp is itchy, it smells weird, it's oily, I have dandruff, and my hair lacks shine and softness. I use Aussie shampoo and conditioner, Tresemee heat protectant, and I straighten it almost everyday. It's really long, and in a week I'm getting a couple of inches cut off and I'm getting bangs and highlights (I'm blonde). What can I do after I get my hair cut to make it soft, shiny, and beautiful?