The best thing for you to do is some reading... Go down to a book store and pick up some books on HTML, PHP, Javascript, CSS and Search Engine Optimization...
After all of that then look at actually writing basic webpages and having them indexed by the different search engines... after you know that you can have your website(s) picked up and found on the search engines then pick a associate program and try to promote such with you website(s)
If you have no interest in doing the above then hire someone, however It's going to be very very costly! and for any updates you will need keep spending big $$$. So educate yourself first.
Of course there is much more regarding web design and networking, however if you are new then start with the basics... otherwise someone will "own" you...
Wish you the very best,
.