Hey Tejasvy!!

there are many sources to learn like w3schools,mdn,etc..
W3Schools is an educational website for learning web technologies online.Content includes tutorials and references relating to HTML, CSS, JavaScript, JSON, PHP, Python, AngularJS, React.js, SQL, Bootstrap, Sass, Node.js, jQuery, XQuery, AJAX, XML, Raspberry Pi, C++, C# and Java.

By using their online code editor, anyone can edit examples and execute computer code experimentally to see what works and what doesn't work before implementing it

MDN Web Docs (previously known as MDN — the Mozilla Developer Network) is an evolving learning platform for Web technologies

thank you....................

all the best..................
stay home, stay safe..........!