How do i make my Waves look better?

okay, i have been trying to get my natural hair back for quite a while I would straighten my hair a lot for school for fun and also for special occasions but now i regret that I have just started doing what every one says to stop straighting it and just let it grow out and use products for wavy hair okay i understand that but i need help trying to figure out how to manage my hair thats one reason why i also would straghten it becuse when i would get up for school i couldn't do anything with it becuse i couldnt manage it and it was a frizz ball too so it was even harder.....so what i am asking is can any one give me advice on how to slove this problem