My portal to the futuristic world

Bronze prize winner to WPC 282
Ajay a 20-year-old boy found a portal in his room that lead him to an apocalyptic world whose science and technology level was far higher than Blue Planet. Let's find what he will find in the portal.
The cover is not mine. The characters are all made up.
The idea of this novel just came to my mind, so I wrote it. I am not a professional writer and English is my 3rd language. So, please have mercy in the comment section andreviewss. If you have any suggestions for me regarding this novel, please tell me in the comments and reviews.
Tags:
Male protagonist
Business management
Artificial intelligence
Robots
https://discord.gg/Tr6tF33X