The vocal exercises will expand your range.
You can sing along while you are driving in your car. Some may think it a bit odd to see and hear you singing “HEY YOU la la la la la” at the top of your voice when you are stopped at a red light, but who cares? LOL
I practiced my French on the way to work while going to Georgia State evening classes. Got enough stares in traffic I finally quit it.
I try not to go where there are stop lights! But yes, I don’t care. Thanks!