I'm going shopping today:) What things should I buy?

Since you're buying clothes, buy two of everything you get. Take all the extras to a church or charity that helps poor or parentless girls your age. Donate them. Ask for a thank you letter, donation receipt, or certificate. Take a picture of yourself making the donation. Post it online, because it's something you can be proud of, much prouder than you can be of your wardrobe.