TryHackMe
OWASP Top 10 Web Vulnerabilities
This room breaks each OWASP topic down and includes details on what the vulnerability is, how it occurs and how you can exploit it effectively.
Burp Suite Basics Room
This room is designed for you to learn the basics and major components of Burp Suite, the de facto tool to use when performing web app testing.
Web Fundamentals Room
This room is designed as a basic intro to how the web works. It covers HTTP requests and responses, web servers, cookies and then a mini CTF at the end.