If you have a caching plugin it’s going to interfere with WP Touch. I ran into this problem as well with W3 Total Cache but Brave New Code saved the day with this tutorial.
You could try this plugin that automatically replaces the standard WP comment box with a Facebook comment box. You could also try any plugins from this search.
I’d reccomend purchasing hosting from companies like Hostgater, Bluehost, WP Engine, etc. There you you can install WordPress along with other popular CMS’s like Joomla and Droopal (of course WordPress is the best).
Try going into your /wp-admin panel and on the menu sidebar on the left navigate your mouse over and click Import and choose the WordPress option. Remember to export your items from WordPress.com blog go go to the same menu bar but choose Export instead of Import. Hope this helps!
Yeah I tried that plugin out but when I activated the plugin I wanted to edit, it led me to the editor of the old theme and showed that the old theme was still active.