This is very exciting for me. I have a communications background, and zero coding experience. (I've tinkered with Wordpress, HTML, and CSS, but nothing anymore

This is very exciting for me. I have a communications background, and zero coding experience. (I've tinkered with Wordpress, HTML, and CSS, but nothing anymore hardcore than that). I've started using code academy and it seems great thus far. However, as a non-coder, they do seem to run through a lot of stuff quite quickly - am I supposed to remember everything I learn after I run the code and steps just once?