Coming from a Linux Admin background, I would suggest installing a Wordpress website to learn more about the LAMP stack and seeing how all the pieces fit togeth

Coming from a Linux Admin background, I would suggest installing a Wordpress website to learn more about the LAMP stack and seeing how all the pieces fit together. Once you get it working on a box, look at how you could scale out the Apache and Application layer. From there one of my first developer projects was creating a Flask Application which uses Python. I think understanding the mechanics of Wordpress, helped me design and build the Flask Application. (Which could be a blog or whatever you want to put online.)