The shower thing works kinda XD But however, that won’t help you, you can look for free lessons on youtube, but anyways, here’s what I was taught by my music instructor
"Singing is breathing" learn to breathe well, and you can learn to sing well, and he’s pretty much right, you have to learn to control your breath, and not to strain yourself, so learn to breathe and control your breathe and how much you let out, also, honey helps your throat I hear, so that drink some of that too