Hi Furqan, You can start with learning languages used to create games today. It will depend on the platform you want people to use to play your game. So decide on that first. For example, a game could be on a website, phone app, playstation, etc.
Try to find a book that walks you through creating a game from start to finish. If you like phone games than look for books about iOS or Android game development. But, probably the easiest way to get started is by developing a web-based game.
Create something very simple and then allow others to give you feedback for improvement.
If you are looking for a summer job, I would try to volunteer as well. This experience could get you better jobs and help with college admissions.