You can learn almost everything in youtube for video tutorial and if you don't find in youtube you can google them. You need to start with a home lab with a simple server or just a computer. Start by installing linux and LAMP or WAMP servers. Create small projects either for PHP if you are interested in web development or JAVA if you like software development. Learn how to work with different dependencies and API and start learning whatever you wanna learn in this field. All you need is dedication and there are lots of resources on web. I will leave some good websites which offers various courses for free below.
https://www.edx.org/
www.udemy.com
http://www.microsoftvirtualacademy.com/
http://pluralsight.comAlso check this one for free universities credit classes
https://medium.freecodecamp.org/200-universities-just-launched-560-free-online-courses-heres-the-full-list-d9dd13600b04