How can i fix my hair?

I dont know what to do anymore. Im so sick and tired of my hair.
1)Its extremely flat
2)It gets really greasy after like one day. Ill take a shower and the next morning it will be flat and greasy as hell!
3)It has the most tangels possible. Ill brush my...

hair and 5 minutes later it will be tangly again.
4)I cant get volume in my hair.

I cant take it anymore. It upsets me so much
Someone help me

im a cosmetologist so trust me! wash your hair twice when you shower. shampoo can dry hair out, thats why they say not to was your hair everyday. but in your case you should twice a day to help with the greasy feeling you have, and dont use conditioner. insead of using to conditioner to try and get rid of tangles in your hair, you a detangler spray. conditioner isnt really made to get rid of tangles, its to add shine and lock moister in the hair, help keep the hair looking healthy. another trick is to add baby powder to your hair when its dry, not wet or damp. not a lot because it will show. but if you use that in your hair, it soaks up moister, which will help control the grease. also try to use a volumeizing shampoo, that will slightly help with the flatness, and also purchase some volumeizing hair products too, that will also help.

Try not to use too much conditioner. It will make your hair greesy quicker. And just put it on the bottem half of your hair. Try brading your hair(: It will keep it tngle free. And cute!

Sorry I couldn't help much, but I tried. Good luck!

ok. you could be washing your hair with water that is too hot which takes all the moisture from your hair causing it to try to make its own aka grease. or you have product stuck in there which if you mix a little of baking soda in with your shampoo will come right out. as for volume I heard a little shaving cream around your scalp does the trick. or mousse is great.