First bit of advice, say what you mean. Try not to leave questions open ended or let them be misleading. I say this because, your title. lol Very misleading. I was expecting a business concept or a link to your portfolio or a plan of some sort to look at.
Your question is a bit broad and it would take literally a book to answer it. My advice, take advice where you can. Always remember that no matter what you know, its not enough. Perfection will NEVER happen. People tend to disagree with this but no matter what you do and how perfect YOU may think you are, the world is not always on the same page. Stay truthful to yourself. If you can't be honest with you, you can't be honest with anyone.
Lastly, you are 16. Do not do what I did and miss out on any of your highschool years because of work or the future. enjoy your sophmore/junior year, which ever you are in. It only comes around once.
Unless you are VERY good at what you do, i would recomend going to a local web designer and talking to them about an internship. Learn and live now while you can. Be a kid.
Good luck with everything.
Enjoy Life,
Nick
When I stand before God at the end of my life, I would hope that I would not have a single bit of talent left, and could say, "I used everything you gave me."