what's your best advice on portrait drawing ? and making drawings that actually look like the people you're trying to draw

hello so I'm like doing drawabox rn and it's kinda driving me insane im on the rotated boxes part of lesson man I just want to know how I'm supposed to apply this stuff to my drawings like how do I apply boxes and ellipses and circles to my drawings when I draw I just draw things the way I see them and that's the only way I know how even outside of drawabox literally every beginner drawing video talks about boxes and spheres and ellipses and I just don't understand how to apply that stuff to my actual drawing