First of all, this is a parallel universe.
So the timeline of events differs from reality in some places.
Some things happen earlier than in reality, allowing the protagonist to take advantage of advanced technology. Others happen later than in reality, meaning they haven't appeared yet, and the protagonist can exploit that. This is very important. The protagonist's birth alone means that some of the world's paths have already changed, and it has entered a parallel universe.
Can you imagine a genius with a brain development level of 100?
Then take your time getting to know the life of a monster.
This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.
