Over the course of my voice training, I've had several "breakthroughs" only to realize there's something more (or even less) to do. In the end, whatever you do, do it every day. Even if after several months you feel it's not where it should be and decide to go with an entirely different approach or regimen, at the very least you'll have some greater understanding and control of the appropriate muscles.
I personally started with various YouTube contributors, then picked up Andrea's program, and now I'm working more closely with recordings for fine tuning. I have a small choir background, so I had a little head start.