Forum Moderators: open
Depending on the competitive nature of your keywords I think a PR2 is low. Your site is probably buried in the SERPs. Google updates once a month. Depending on your change it could take 2 months to see your changes. You should try and constantly add new pages that target new keywords. Let google find your pages. If one page is in it will find the rest.
Don't worry about starting off in the wrong direction. I did the same thing myself. Stick around and I think you will find a wealth of info. Try and get good quality inbound links from other sites within your theme. This will raise your rankings and your page rank. Remember good unique content is key.