This is the most toughest one for anyone to write. The creation of universe is a matter of debate. No one can't say anything about neither GOD nor HIS UNIVERSE Because both of them are vast.
When we take GOD, Explaining about HIM is impossible and about UNIVERSE I can try it out to some extent. If we go by various religions book each one gives it own stories and that why using science we can say about the universe to some extent.
Scientists worldwide have said that the universe was born before 20 billion years ago. But few argue it is 10 billion years ago. Anyhow nobody knows the truth because no one of us were alive during that time.
Next they say that the universe was not what it is now. Meaning now we have so many stars, planets, galaxies, milky-ways in our universe but earlier at that time that is at 20th billionth year the universe was empty. It only had infinite space filled with various gases. So it was like a very vast space with no end. If any astronaut as now would have travelled then wouldn't have returned alive.
So after space that is universe was formed then came the milky-way around 14 billion years but some argue it to be 8 billion years ago. So milky-way gave birth to many galaxies around the same time and this galaxies split into various solar systems around 4.6 billion years ago and our planet earth came into existence on the same time but after other planets in our solar system.
There is also another way of theory which says that FIRST BIG GIGANTIC MOUNTAIN LIKE THING CAME INTO EXISTENCE AND THEN AFTER COLLISIONS AND VARIOUS EXPLOSIONS BROKE INTO VARIOUS PIECES AND THIS PIECES STARTED TO ADD WITH VARIOUS MYSTERIOUS THINGS IN THE SPACE AND FORMED PLANETARY SYSTEM AND THEN IT TURNED INTO SOLAR SYSTEM AND THEN INTO GALAXIES AND THEN INTO MILKY-WAY AND NOW IS IN THE PROCESS OF EXPANDING THE UNIVERSE WITH ONE MORE UNIVERSE GETTING ADDED TO THE PRESENT ONE AND THIS PRESENT DAYS SCIENTISTS CALL IT HAS BIG BANG THEORY. There is no approval for this theory so the first theory is accepted worldwide.
So GOD'S UNIVERSE has this story. It is tough to believe but science believes it and has various proofs. So based on that it can be true one but still it cannot be considered as 100% genuine because there was no one alive from that time till now and leaving GOD, I DON'T THINK ANYONE ELSE CAN EXPLAIN THE THEORY OF THIS UNIVERSE WELL.