Your site DOES appear in Google. If you search for site:stickerapt.com in Google, you'll see your site. That's a good sign! I also found your site when I looked for some text on your home page in Google, as well as searching for StickerApt.
So, you are in Google, but you are having some trouble ranking for your keywords.
Google will keep coming back to your site, so it will find new content.
I would add the content to your existing pages. It will help your customers, and it will help Google.
Look in Google Webmaster Tools for any notices that you may have about your site.
You do want backlinks, but you want QUALITY backlinks. Submitting your content to 500 article directories is not a quality backlink. A quality backlink could be from the real estate agent who uses your stickers, from your chamber of commerce listing you as a member, from someone writing about projects using custom stickers, etc.