How Make My Coding Style More Sleek/Optimized

Question

I did this Program

https://code.sololearn.com/Wf8Vx8iHOeFo/?ref=app

Using javascript and stuff its a decision tree

But I think I have Poor Programming Etiquette
What Tips would you give me

What am I doing wrong?
What am I doing right?

Whats Good Programming Practices

Answer 1

I tried to add a second node to the first node, but it doesn't allow me.

Answer 2

Shud have labeled this help me debug😂