Affiliate Marketing Secrets

Hi, I have been doing a little research and I have had a great idea for my own website in a very niche market that I would like to pursue. Unfortunately I have no idea how to go about this, whether to set up a website or a blog and how to do it. My website will probably take a more blog style of writing, as in written by me and being more personal, however I would eventually like to start advertising with it to make money, and allowing people to sign up to it as well, so would it be more beneficial for me to create a website? if anyone have any knowledge about website/blog creation they can give me, and the best creation site to use to go about this, i would be most grateful for their advice!