Ask HN: What should I know to start a business making websites in highschool?

So I noticed that a lot of businesses around me didn't have a website, or if they did it wasn't very functional. I thought a good way to make a little money would be to make some websites for local businesses around me!

I'm obviously still new to this entrepreneurial stuff, and I feel a little out of my depth. I've been lurking on HN for a while and I thought it might be informative to ask if any of you have any suggestions?

For example, I've quickly made a landing page for our "company" [1] but I don't know if it has everything we need. Thanks in advance!

[1] http://www.sitebyte.xyz/