So I looked up some singing videos and practiced only what appeared to be the most useful exercise out of the many other ones for a while and eventually got lazy :D
I sang a lot when I'm in the shower and when I was driving alone in the car, which are times where I can shout and shriek those high notes terribly without causing damage to anybody's hearing and mental health. After many years of this. I think I'm finally able to produce something that's still not yet perfect, but it's a product that I'm satisfied enough with ^^
PS: I'm from Malaysia so naturally my French is a bit off. This just happened to be one of the songs I am singing a lot lately haha.
I am open to all comments that would aide me in my journey of self-improvement.
Thank you for listening!