Your site is indexed
Your site is indexed, use site:yourdomain.com
in Google and your see the indexed pages. Test here: https://www.google.co.uk/search?q=site%3Ahttp%3A%2F%2Fwww.relaxacion.com
WordPress is not being blocked
The only way WordPress would be blocking your pages being blocked is using robots.txt and noindex, I've investigated and none of these seem to be an issue.
Don't always trust Google Webmaster Tools
Google Webmaster Tools is often incorrect or outdated... The fact it says 0 indexed obviously is wrong because your site can be found in Google.
Ranking issue
What your describing is ranking issues, the only problem you have is that your content is extremely lite... You have embedd of videos on the page with no text. Google will not favour these pages, give the videos descriptions and try to keep pages above 300 words if you want good rankings.