Good start there's potential, but if you want to become good at voices (or even just being cast for something with your regular voice) you need first of all practice of course. I'd suggest a new voice demo, but you need to be reading something while you do it.
Anyone can read into a microphone, though it has to get to the point where it sounds like you're talking naturally as if the script isn't there. Perhaps record yourself, listen back to it, recorded again, and repeat until it gets to the point where you feel as if it's something that you yourself would use in a feature.
Just some pointers I thought I'd throw in, good luck and all the best!