That sounds like you're using a tutorial aimed at developers from other languages. You can get started with much less and you may want to look around a bit more

That sounds like you're using a tutorial aimed at developers from other languages. You can get started with much less and you may want to look around a bit more for things that ramp you up more gently, eg starting with serving static content to dynamic content from parameters to databases to the various bits of front-end tech. At some point in software you will realize that there is more going on than you will ever know in detail and the best you can do is understand the salient points and some things are simply not worth learning.