That God exists having no beginning can be mind boggling,but no matter how you look at it,it is still mind boggling.
It does seem hard to grasp that God can exist having no beginning,like how can He always be.It seems strange to believe that someone,or something,can always exist,but if God did have a beginning,then a God must of created Him,but then there would be no beginning to Gods creating Gods,and that is mind boggling,so no matter how you look at it there can be no beginning,whether God always exists,or Gods are creating Gods.
But believing God always exists having no beginning makes more sense than Gods creating Gods having no beginning,and God is an omnipresent Spirit that fills all space,so where would be the room for the God that created Him,and where would the God get the materials to create this God.
It makes more sense that God has no beginning,and space keeps going without stop,than Gods are creating Gods,with no beginning,and space has an endpoint.
So no matter how you look at it,there still has to be no beginning.
The thing is where did God get physical matter,did He poof it from nothing,for it did not come from Spirit,for they are separate things.Either God used His Spirit to create the physical things,or physical matter always exists,which is more mind boggling than God always exists.
It appears that physical matter also always exists,and God takes that matter and forms it in to whatever He wants.
Maybe there was a big bang,not evolution,but God caused the physical matter to appear that way,so He could use it,but still it is hard to believe that if God as an omnipresent Spirit,the only substance in the universe,before He created anything,caused physical matter to appear from nothing.