Hi Georgie,
I would like to opt in for google ad sense ads. can i do this on my current blog?
We have an advertising program called WordAds, which you can read more about and apply to here: http://wordads.co/
Advertising outside of WordAds at WordPress.com is not allowed. For full details, please see:
http://support.wordpress.com/advertising/
http://wordpress.com/types-of-blogs/
Also, i am trying to set up the blogs i follow, i can find the field where i enter the blogs i like.
You can use our Blogs I Follow widget to do that, please see here for more information: http://en.support.wordpress.com/widgets/blogs-i-follow-widget/
also, i understand there is an SEO plug in i can use. Can you tell me how get this installed on my blog?
We don't allow plugins on WordPress.com for security reasons. Plugins are a feature only available for self-hosted blogs provided through WordPress.org. You can find out more about this topic here: http://support.wordpress.com/plugins/
The good news is that WordPress.com handles SEO optimization for you. Beyond the normal optimizations like your sitemap, which you can view here:
http://aparisdiary.com/sitemap.xml
We also have a global system for tags/categories that search engines love and we ping out to all the major engines every time you update your blog.
http://en.support.wordpress.com/topics/
No worries, we've got you covered. :)