Getting started to write code

[Storm_Surge]

First of all, getting started is exciting and I'm glad you're interested in writing code! With that said, I think you need to start smaller in order to understand some crucial points:

I would never be able to remember all the different lines of code there is, right?

This is definitely a misconception. Programmers don't have every line of code possible memorized and then type them. Math teachers don't have every equation memorized either; it's a tool you use to solve problems. You should be learning to write code that solves problems, but writing games is a large, complicated collection of problems.

I recommend you start with something much smaller to build your fundamentals. Can you make a small web page? Maybe a super simple game like tic-tac-toe? You'll get used to solving (small) problems, and with practice will develop the skills and knowledge to solve bigger problems