Advice for doing things

So any advice for doing things on the ground like wave dashes and wall dashes. Also just some aerial advice. Im in gold so anything is appreciated :D But really why cant I go forward when I do my sideways wave dashes, arent they meant to give you momentum. Also some stuff to help with ground freestyling would be good like help with flicks and before you roast me I just like playing for the fun so I wanna learn how to freestyle :D