Here is something I found in a Google search.

"There exists a west-to-east as well as a south-to-north clinal distribution with respect to E3a-M2.
Bamileke and Benin display the highest frequencies (100% and 95.0%, respectively), Kenya and Tanzania show intermediate values, and Oman (7.4%) and Egypt (2.8%) exhibit relatively low percentages of this subclade."

From reading this, it appears to me that your Y-chromosome has a very high likelihood of being from west Africa [Bamileke or Benin], with a lower possibility of being from east Africa [Kenya or Tanzania].

Do a web search for "Haplogroup e3a (m2)" and you will get lots of hits, some from other people posting queries on various forums and some from scientific journals with lots of dense jargon.

I am going to have to spend some serious time with the Megan Smolenyak/Ann Turner book on DNA testing. Their book is specifically geared to DNA testing for genealogy.

Check for it at your library. I got the copy I am reading from my local library.