I'm 13 yr old as well, I can give you suggestions based on two IFs:-
1. If you want to learn to code for the sake of game development then I suggest you start with GDevlop(a non-coding game engine) before learning any programming language because then you would know how game code works and what you really need to do when you get the hang of any programming language.
2. If you want to learn to code for the sake of just learning a programming language, then I'd suggest you start with python because it's lightweight, has a syntax similar to that of English and really easy.
If you want more info then contact on my
Discord: ⒸⓊⒷⒺⒸⓇⓎ#5529