You can do anything you want, and it's just you will require proper knowledge to do that. And if you have the appropriate expertise and systems, you can own a repository very quickly. For that, you will be required to have proper and working addons on your side. So, you need to develop an addon on yourself, and then you can make your repository. It will take some technically n=knowledge, and If you don't have a passion for computing, then it will be tough to do that.