Thank you for your advice :D !
Happy that you laugh ;) !
I had some experiences in the past with video game, All you said here is true ( have full movement, make html file ). I used to work on Unity before and Godot is really a new engine for me ahaha ^^ . So I try to learn all the new stuff, rules and way to think ( about programmation, design ) even though if I knew the basis concepts , It was pretty hard, but I will make my way with the time. About the music, I'm learning too, but will take my time .