It is really important to take a first step and this time it is about moving toward understanding the web technologies (HTML,CSS,JS,PHP), most of the web technologies that you see around is based on few coding languages and frameworks so if you can have good idea of how these language works then you can create your own cross platform modules to deliver high level of dexterity and automation.
Now HTML which is also know as the HYPER TEXT MARKUP LANGUAGE , whatever you see rendered in your browser is presented in the HTML layer, so once you get good understanding of HTML then you can render webpages and by clicking VIEW PAGE SOURCE you can easily and deeply analyses the complete web structure, plus if you are good with python or lets say PHP then you can create web crawler which can automate data scraping and information gathering for you.
Anyways HYPER TEXT MARKUP LANGUAGE, is the language of the internet along with XHTML, XML etc, so now along with HTML , i also have to mention HTTP and HTTPS protocols but due to the subjectivity of the topic i will share it in another abstract, if you can observer above i have mentioned both HTTPS and HTML and you can see HT is common in both because SSL (HTTPS) or the LOCK SIGN that you see on the the URL BAR OF THE BROWSER is the ENCRYPTION and SECURITY PROTOCOL and with the help of TLS THREE WAY HANDSHAKE your website gets way more safety.HTML is the core essence of web technologies, and learning it is super easy and it is a well structured language with hundred and hundred of schemes and frameworks to extended functionality to a very high level.
All you have to do now is to go and google up HTML and geek out, but for the sake of simplicity and lucidity i am sharing 3 best resources which have provided me the latest info regarding HTML and RELATED WEB TECHNOLOGIES. Below i am sharing the listing:
WEB RESOURCE #1 : https://www.w3schools.com/html/
WEB RESOURCE #2 : https://www.learn-html.org/
WEB RESOURCE #3 : https://html.com/