Learn to develop websites, web apps, games, APIs, mobile apps and there are many more.
Seek some sort of internship at a Software company, most likely, if you perform well, they will hire you. That is how you make money.
Or create your account at freelancing websites, apply for the jobs that best fits your skills, that is how you make money.
Create your own product/app, launch it, it can be a blog, or a mobile application/game and launch it, in the beginning, try to get as much people as you can to use your product. Then start doing affiliate marketing on your product. Apply for Adsense too. Or i your product is providing some sort of facility to users, make them to sign for a paid monthly membership.