So today I watched a YouTube Video that showed me how to create a calculator using JS but I want to “sponge” as much info as I possibly can.
What I did was follow each step and built the program exactly as the teacher showed. Is there a way I can follow tutorials and retain more information?
The more you struggle, the more you retain. Rather than following the tutorial, try building first and then using tutorials to help or correct code that you had to figure out on your own. Or, better yet, build something yourself and ask for help when you need it.
Pretty much what @ArielLeslie said. The more you tinker and struggle with the concepts on your own, the more you will retain. The repetition and practice is critical for retaining knowledge.