I don't have a melodious super sexy girl voice, plus I sound really country to some people. Sometimes I HATE it. You can certainly make sure that when you speak you're just a bit clearer than you think you have to be. I kind of had to work on that when I went to college (I have an accent that wasn't as…respected by certain people). Oddly enough, watching older movies from the 1940s/50s helps with that. Same thing with using fillers. catch yourself doing it and try not to. It's an annoying habit to break and you will use fillers at some point but again, it's something that you can change. The more experience you gain with things, the better this will get as well.

Just because you don't have a high pitched voice doesn't mean it's not attractive. The stereotypical newscaster female (at least in my imagination) has a deeper voice. There are several female actresses who have deeper voices and that was/is part of their appeal. Joan Crawford and Lauren Bacall come to mind immediately. It can make you sound womanly and mature.