Thank you both for the replies!
@Jamie - I will definitely check out that forum, and look up that youtube channel! Thank you!
@Cindy- Thank you for the warm welcome, you are so kind.

She has actually told her brother that she is transgendered, but we're honestly not very sure how he has reacted to it. We do know that he has this unwarranted hatred of me, and we speculate it's because he blames me for her being trans, which is due to lack of knowledge about what it really means. But we're not sure he is even willing to learn more. However, the biggest reason why she cannot wear her girl clothes around him is because we live in her grandparent's house (we're taking care of it for her parents) and her mom specifically said she cannot transition while she lives here. (She has already come out to her whole family in fact) Her brother would most likely tell her mom, and we may get thrown out which is something we definitely cannot afford right now. :C
But he is only here for a couple of months, and Paige said that she can make it through that.
She has had her ears pierced for a while, I actually bought them for her birthday 2 years ago. She has a lot of girly earrings along with some androgynous ones that she can wear out if she is uncomfortable with the girly ones. She also paints her toenails, and we have a lot of different colors for her to pick from. I am not sure if we can afford laser hair removal yet, but I will do some research on the costs and start saving up for her. She works at a department store and I am a starting out freelance illustrator, so money is really a problem for us right now unfortunately. She has been having trouble getting rid of her body hair like her legs, but I am going to help her and teach her how so I think that will make her feel A LOT better.

As for where we live, we live in Michigan, in the U.S. From experience, I have found th epart of Michigan we live in to not be so tolerant. I am gay and I came out in High School, and I was pretty much made fun of every day until I went to art college. However, we still have laws against discrimination of LGBT people, so if I can convince her, I think taking her out to get her hair cut, her eyebrows done, and to talk to a makeup professional at Macy's will really make her feel good.
Again, thank you so much for the replies and we will definitely take your advice! I will be back if I have any more questions.