(a) The sitemaps aren’t fine because something, probably your settings >> general is mixed up (WordPress address has a www and your Site URL doesn’t, or vice-versa; they don’t match), and the SEO plugin WordPress SEO isn’t configured properly. If you believe it’s configured properly, uninstall it, delete the files, and reinstall it.
(b) You don’t just make a website and see it blossom on Google. I have an entire corporation dedicated to this; if it was just as easy as adding an SEO plugin, there wouldn’t be a need for people like me.
An SEO plugin adds meta data to your site — specifically, a meta description and a meta title. There’s debate as to whether or not it’s even beneficial to have a meta description (force one on Google), or whether to let Google choose what snippets they want, when they want.
So search marketing is much more than adding a plugin. With some clients, I don’t even want an SEO plugin.
There are two aspects to search marketing: (1) on-page SEO, and (2) off-page SEO.
On-page SEO — getting your content in rife with key phrases, meta data, H1 titles, etc., is about 10% of your overall SEO.
The bulk of your SEO campaign is off-page SEO … doing things that aren’t even on your website. This includes “going social” — having social media outlets, but too many make the mistake of thinking “going social” is all you have to do, and you’re done.
Most importantly, you’ll have to develop a Google Webmasters account, add your site, submit your sitemap, and ask Google to fetch your site.
Within 24 hours, I’m sure the Googlebot will index your site. You’ll also want to do the same with Bing Webmaster Tools.
Then, list yourself in directories; develop a solid link-building and networking strategy. Market yourself; write pages and posts with good content and ensure they’re visited.