Well for website design, I mainly use html and css. But you can also use java to help. I am just going to learn the basics, then teach myself by reading lines of codes from video games. Honestly making a website is very easy, and the first language that I learned was BASIC. As for C++ when I learned, I would start of with
#include <iostream>
then when I went to either w3schools, or codeacademy, they started off with
#include <"I don't remember>
It was different than what I was first taught, so it confused me. As of now, I am using video tutorials by "thenewboston" on youtube for Java. If you would like, I can link you to his channel.