How to live life without God?
The same as living life without Santa Claus, fairy's, leprechauns etc. I do just fine with out all of the above.
No one has ever lived life with a god as they are mythological fairy tales made up by man. The question is how could one live life with an actual god?
Without god, you get to be the one to answer that question.
Humans have worshipped many gods and we will no doubt move on from the current one at some point. I live an absolutely incredible life of reality based on science and fact. I answer to my own moral compass and don’t fear nonsense from a book of fiction.