Yeah, after a few weeks it REALLY changed my voice, too. That's why I stuck with it. A year later, I still feel changes inside my body (especially increased air flow and resonance from my lower stomach all the way up to my throat).
A lot of people recommend vocal workouts. Other people, say don't do vocal workouts and just sing instead. Singing alone never really helped me, but vocal workouts alone isn't enough either.
So, if possible, do both. You learn different things from each one. Vocal workouts exercise your voice (think of it as a physical workout to get better pipes). Singing songs help you to learn the art of singing tracks.
I tried singing songs every day, but it never seem to improve my voice at all. So I decided that singing songs wasn't the best thing for building my voice. I turned to vocal workouts and instantly felt big changes within 2 weeks.
Now I've done vocal workouts for over a year. So my voice feels much more agile, flexible, and hitting the right pitch is almost effortless now. It's an incredible feeling. But I never really practiced singing songs seriously. So I have trouble controlling my voice in the context of a song. So that's my next area of focus.
Also, if you can afford it, get voice lessons. Find a teacher that you admire and is able to honestly critique and shape your voice in a way that you like.
It seems like you're making good progress!
I think I'm similar in a way. One thing is for sure, never sing (songs) with a raw voice, especially if its in the higher ranges. Gotta always warm-up.
So when are you gonna post up a clip? lol