The internet is not a fuzzy cloud. The internet is a wire, actually buried in the ground. Computers connected directly to the internet are called "Servers," while the computers you and I use are "clients". Learn how clients and servers interact with each other and a quick introduction to how the internet works.
What does it mean to be a web developer? A front-end, back-end web developer. Web Development is categorised into multiple functional role, watch this video to understand different roles and scope of work.
Since you already know how the internet works, it's time to know it in the sense of what a web developer needs to know. This video focuses on the perspective of front-end development.
You know what a developer does now but you'll also want to familiarize yourself with the basic tools of the trade.
Certainly, your technical skill is important... but that is a pre-requisite. Technical skill isn't what makes you great... it's what makes you a developer. What makes you great are your "soft skills".
And what I’ve learned from teaching others