If you were in a class, Philosophy 102, it would probably not be long before you would be asked questions such as these: what are we here for, where did we come from, what is our purpose, and where are we going. Life’s great mysteries! God says, “Lean not to your own understanding, my ways are not your ways.” So He is likely not going to explain to you what “nothing” is since our brains mostly only think “space” instead of nothing. I don’t even want to take Physics 1! Those things are too big for my brain.
In the spiritual realm also, that’s the way God is. God has given us the basics in the Holy Scriptures. That is called the milk of the Word. God so loved the world… By faith we are called to believe on Jesus Christ, his birth, his death, his resurrection. There are a lot more interesting things we can know, called the meat of the word. But you need not blow out your brains because your teeth are not strong enough to chew steak.
He will give you enough answers to help you find peace as you snuggle down in his pleasure, knowing you came from God and you are going back to God.