Where can I subscribe/enroll for something like this?
It is not difficult. You start by browsing through the sites which sells photos. Get an idea what sort of photos sells best. Learn how colours and composition works in a photo. Start taking them yourselves, fix colour, sharpness and crop photos with free photo editing software. Post them on sites recommended here:
http://blog.autographer.com/2013/12/top-10-sites-sell-photos-online/
http://thenextweb.com/lifehacks/2011/09/22/a-beginners-guide-to-selling-your-photographs-online/
You could post a thread here on the digital goods subforum and them for bitcoins