traveler34

Read this,   it is quite interesting although for another country  
https://www.uscis.gov/ilink/docView/INT/HTML/INT/0-0-0-42832/0-0-0-58706.html
 

Ok that's a good thing.  Do not start ANY filing until you get the first marriage properly dissolved.
USCIS may deem your US marriage invalid since you were not free to marry at the time.  
 

Traditional in the Kenyan sense could mean one of two things; customary marriage where dowry was paid etc or come-we-stay.  It would help to know which category you belong to in order to give advise accordingly.

Please do not attempt to get married now without first sorting out the previous married. A married is considered married as far as it is legal in that country even if it is traditional. Trust me they gonna have a copy of your ds 160 form on there computer during your aos interview. IO will ask you, your ds 160 started you're married and now you want to marry another guy. If you can't provide a divorce degree/certificate you might be charge with polygamy which is federal crime in USA. You are from Africa just ask somebody to get a divorce document for you. It is not difficult as you might think especially you from Africa if you know what I mean lol..

Also, think this way, if you were still "traditionally" married, then married this US person, and now you go get the divorce decree or what ever it is. Your 'marriages' overlap. Meaning the US one technically but standards isn't legal, and actually a crime as in to be married to more than one person by US law.

In places with traditional marriages there are traditional divorces.   In Eastern Nigerian it is a meeting of the families where the bride and all of the bride price are returned to where they came from. Almost a revered engagement  .