Hair help pleas thanks

I have the same exact hair type!

SCRUNCHING:
The reason your hair doesn't scrunch that well or it takes a long time to scrunch it is because it's not naturally that way. I would always have sections that looked good and then sections that looked bad. The thing that worked best for me was
*a diffuser attachment for my blow dryer
*Marc Anthony curl cream
*Aqua net hairspray
However the biggest advice I have for scrunching is BUY AN S WAVER. IT's great for touching up areas that aren't looking how you want them, or you can just use the S waver without scrunching

STRAIGHTENING:
I cut my hair short so now I straight it every day. It's very sensitive to the humidity as well.
*when you blow dry your hair, part it. then blow dry the roots the opposite way of the part, and continue blow drying as usual
*I use Frizz Ease weather works shampoo and conditioner and leave in cream
*I have a chi iron. It works the best
*If you want it to look fuller try not straightening it that much on the bottom

Also, the reason your hair may look flat or thin when you starighten it is because you have split ends. You should cut about 5 inches off your hair. Then when you starighten it it will look full.

I did this and my hair is thick and nice now! It was worth it!

Ok when ever you want to straghten it.
1. Get a leave-in-conditioning spray ( I use John Freida or Aussie)
2. Spray in your hair and comb it out completely after a shower.
3.Blow dry your hair using a flat brush and any blow dryer.(dont flip your head over.this will make your hair poof out to the sides which is not what you want. instead use a root lifter on your roots and lift sections of hair on the top of your head as you blow dry it.)
4. After blow drying.use a ceramic straightner to smooth it out so it isn't to full.

As for curly.use a diffuser when you blow dry with scrunch spray.

Try sleeping with wet hair and soft rollers in and combing it out in the morning. That should give you similar waves as Miley Cyrus. Use a curling iron and wrap your hair outside and around the curler rather than clipping your inside the curler - if you know what I mean. It's hard to explain without actually showing you. This technique should give you some nice lose spiral curls. Comb them out to get amazing volumed waves.

You can also try this tip. After you take a shower, put your wet hair in a bun. Let your hair dry. Open and comb through.

link Check this link out. They show you the steps for the miley cyrus hair.

link This link gives your a tep by step procedure in making your hair look like Vanessa Hudgens.

Give these tips a shot. Should give you some good curls/waves.

For the hair being straight and full. Check this video out. It shows you how to blowdry and create the perfect volume. link

Also check this out: link

link

link

So, check out these sites and see which one helps you out. The last couples ones deal with hair and creating volume without making it look poofy.

Goodluck.

Hope this helped.