@Tyoma:

Why not start by running it on your own computer? Any regular LAMP/WAMP/MAMP setup guide (for Linux/Windows/MacOS, respectively) should give you everything you need. Once you’ve managed to run it on your own computer, you’ll be in a more-confident place to consider trying to set it up on a different one.

Then, you can try selfhosting on something in your own house (that you don’t mind leaving “on” most of the time!), like a Raspberry Pi. Same deal! Just take one step at a time. Don’t worry about each step until the last one is done and you’re happy.

Then, once you’re confident it’s behaving right, you can reconfigure your router so that traffic comes in to your Raspberry Pi. Use an unusual port if you like. If you don’t have a static IP, look at a DDNS service. Then you’ll have everything you need to access your selfhosted RSS reader from anywhere in the world! Magical!

Just remember: one step at a time. Start with the simplest thing, then build from there.