My hair is so dull what products do you use after shower/ before styling

junli

Shampoo / conditioner ? my hair is so fine and flat. I got layers I got the reckon volume brush. Nothing. It’s greasy at the roots and dry at the ends it looks flat to my head and has no life. I’ve tried everything. Please give me your hair routine…. I need a game changer cause I hate my hair… I wear extensions to add something. I want to rock my real hair but I hate it. Styling products ? Anything !! Help