It won’t give you any extra performance in games, you’ll be using a Windows emulator to emulate Windows games in Linux. In the end, if you don’t have enough time for troubleshooting (which will take a lot of time), it’s not worth it. As others have said, “Linux is free if your time is free”.

Can I make career of it? If it is, can you suggest me courses should I follow?

I don’t think he will