Hello everyone, thanks for your responses!
I've never heard of Groove3, but it does look interesting.
I have heard of Lynda, however, but only heard of them: I know nothing about Lynda whatsoever.
I'll definitely be looking into those two. Lynda looks very interesting because it's not strictly music-based, so I could potentially get more of my money's worth from that (along with music, I also do game creation, and basically all areas covering that, so an all-around option like Lynda is nice to consider.)
For the past five years, I've been doing the free route, and am looking to bump it up to the next level with more quality and consistent training, rather than a piecemeal "here's a Youtube video, oh and an article here" type of deal. Don't get me wrong, I've learned a lot from doing that, but not as much as I feel I can with proper training.
Thanks again for your responses and suggestions!
-Hypocrita