HTML and CSS Resources:
YouTube tutorial for absolute beginners - https://www.youtube.com/watch?v=UB1O30fR-EE
W3 Schools - https://www.w3schools.com/html/
Django - https://www.djangoproject.com/download/
Javascript Resources
We have used LifeIsTech and Khan Academy and Code.org sandbox (gamelab) to practice our Javascript without needing to learn the HTML/CSS.
Official Documentation for Javascript including links to tutorials for beginners to advanced programmers
HTML button Javascript OnClick tutorial - free code camp
PHP Resources
SQL Resources
SQLite - https://www.sqlite.org/download.html