Dear Brother Joseph,
Salaam alaikum,
"Knowing the Most Beautiful Names of Allah is the basis of all objects of knowledge, because all knowledge stems from these Names"- Ibn Al-Qayyim
Do your best to understand, memorize and ask Allah through his Beautiful names.
Really? Where do the 99 names of God come from? Are they collected from the Quran?
Salamun Alaikum sister,
The 99 names of God is not a concept taught by the Quran. Some names may indeed come from the Quran but the whole concept is based on Islamic secondary sources.
You may find the following article useful, God willing.
'ALLAH' IS NOT AN EXCLUSIVE NAME FOR GOD
http://quransmessage.com/articles/allah%20is%20not%20an%20exclusive%20name%20for%20god%20FM3.htm
Regards,
Joseph