well um not a good arguer in the 1st place,anyhow the question is if everything was created by god how was the god created? or how did the god come to the existance?
God never come to existence in the world..and it is not necessary........
for an example think you are a engineer you made a car...... so you know A-Z about the car though its mechanism,interior ,design,operation etc.....
if car has a problem it is not necessary you to become a car to understand the issue....likewise God he is the creator doesn't need to become a human being or anything same to what he has created to understand the world or the its operations..........
he create man and other creatures and send to this world to test them... from the very beginning there are many messenger from God sent to among all man kind,,,to connect them to God...
each and every time God sent messengers,,,some group of people accept them some reject them.... as you may know Abraham,Moses,Jesus..Like wise last and final messenger prophet Muhammad sent....(he is uneducated means doesn't know read and write)
he didn't do any magics like others did... but the magic was Glorious Quran....that like any human like prophet Muhammad cant reveal by him self....many Examples i can give you if its workout unless.... its nothing to do with argument... as i believe ,understand,logically also many things i din see yet that i strongly believe... not to fail to success.............
the trust or believe of God should come from heart no one can force... if you ask every thing by logic... though Science also not enough sustained or developed to prove those........