How do you establish a business?

[marianna]

I'm already in the process of trademarking my business name. I got my website & facebook up. My business is an internet business.

It started with my facebook like page (that I thought would go no where) & is not almost up to 150k likes. My page has been up since august of 2012. I basically post about fashion, make up, hair styles & alot of other really girly stuff (kind of like the page dresses & fashion & what girls like except I show where to get them). & when I hit about 40k likes I was getting contacted by business to post about their make up or clothes or interior design. I created my website, twitter, instagram & website. I also have business cards

I also get paid from google adsense ppc & affiliates on my webite. And I get paid for promoting other business through my facebook page
$75 for a post every 3 days in the month
$100 for a post every 2 days of the month
$125 for a post every day of the month

My paypal account is FLOODED with money but I haven't spent it & don't plan to until the beginning of the year because of taxes. I also work ALONE on this, up to 5 hours a day but next year I plan on hiring a 2 or 3 people to help me manage all of this since I'm in school full time and work as a nurse part time.

Since this is getting more out there to people I was wondering how I can make this an established legitimate business. I'm getting between 7000-10000 likes a week now. I plan on taking some business classes in the summer. I can't take them now because I'm in school for nursing (MSN). This internet business is really just something I do on the side to turn a little extra cash. But I do wanna make it legit.