How much you earn from Adsense will vary depending on a number of factors which include...
- The cpc of the keywords you're going for
- The country you're getting most views from (tier 1 are best).
- The number of pageviews you receive
- Your ad placement and if at all your readers are clicking on your ads.
At this time, if I were you, I would worry less on most of the factors I've mentioned above and instead focus on growing your organic traffic.
Your site is about teaching people about blogging, right?
Shouldn't you be knowing these things already?