Aw, it takes a lot of time to get the voice right. I know this may not be helpful, because I have a high voice naturally (but I do make a conscious effort too sometimes), but all you gotta do is keeping your larynx in a higher position while you talk and use more head resonance. It's hard to master, but with lots lots of practise you'lll get there. Or, you could save money for VFS, though, it must be really costy, but it may be worth it! Also, while you're in the awkward stages, try to sooften your voice's tone, I know many cis-females do not speak softely, but in our case, it helps

best wishes, xxx
EDIT: If your voice is above the 160hz mark and you can get higher easily, then DON'T WORRY, that's exactly the point where a voice starts sounding female. It may sound adult-ish, but still female. You just need to get the resonance right so you can manage to speak with enough volume and voila! keep practsising, it will become natural to you.