Changes are hard to gauge. I was on a low dose and I got two big voice drops before switching to a full dose of gel and then to injections. Despite my T levels being consistently lower on shots, I've had way more changes over the last few months than I did on gel. But I think it's all personal chemistry at that point.
Not sure what your weight situation is, but in general having a lower body fat percentage will help T do its thing more effectively, which will help with fat redistribution. But there's no telling what changes you'll get and what you won't, and how long it'll take things to start working.
Agree with Aero - losing weight and starting to lift might be your best option for fat redistribution. The voice is just straight puberty - your vocal cords are changing. The fluctuations will calm down, but you have to be consistent with your T use.