Listen to these replies!
These are serious and experienced people. Their answers are your path to understanding the rigmaroles of HTML and CSS, which is the only way to go in web development.
I was a total NOOB a few years ago. Now I am an educated NOOB, and I am empowered by having been a member in here.
ANY serious questions in this forum are treated seriously, and you will receive a serious answer.
Good luck!
Alfie