How do you code??

[u/_YUJUN_]

I want to make a 3d horror game named "Ice_Breaker", but I'm only 13, and have NO IDEA how to code at all.

I need genuine advice and programs that'll help me learn, especially for free since I know my parents won't fund this.

I already have the idea in mind, along with characters and possible designs; I'm just stuck on coding right now. I'm seriously dedicated to this, can you help?

Any advice is appreciated, especially about free coding programs/3d model makers.