I need some beauty tips EMERGENCY?

Well lets just say im not in the popular girly crowd. I always wear jeans and a top with no acessories. I always put my hair in a ponytail and hairband(it is thick, ginger and wavy). My nails are very short and the skin around them is ragged from bitin it. I only sometimes wear makeup, just mascara, eyeshadow and lipgloss. I never wear perfume. I have spots and can't seem to get them away. Well that's it so:
1:how do you pick out an outfit with acessories?
2:What syles could I use for thick wavy hair. What products should I use and how do I use them?
3:How do I stop myself from biting my nails and skin and care for them?
4:What makeup should I use and how do I put it on?
5:What teen perfumes are hot right now?
6:What spot products work really well?
I'm a 13 year old girl who needs help
PLEASE you don't have to answer them all anything would be helpful but no rude comments. Thanks xo