Ask HN: How can I improve my message?

Hey all,

I'm a coder, not a writer nor a graphic designer. I recently published http://howtocode.io, a site targeted at people who want to teach themselves how to code but I'm afraid the message is not clear. I am not a native English speaker and my sentences may be too long or too confusing.

Do you understand what the site is all about? What should I improve to make the message clear?