Wikipedia:Username policy - Attention. This is very project specific. For example there are huge differences between the English and the German Wikipedia. The German Wikipedia does not even have a specific user policy and generally favours transparent user names. The same are forbidden as "promotional" in the English Wikipedia.
About how to become an administrator, the Wikipedia has an Miniguide to requests for adminship. If you have some more time and want to see how it plays out in real life, here is the last succesful nomination: Wikipedia:Requests_for_adminship/John_M_Wolfson. And in case you have three or four weeks spare time around christmas and want to fall down in this rabbit hole to never come back, you can see all the articles in the Category:Matters_related_to_requests_for_adminship. I guess, American presidential elections are easier.
