Oh sorry I should have mentioned, I'd been practicing on my own for somewhere around a year and a half before then too. I made piano the focus of my life for a while, working minimal hours so I could practice more, read more and listen to more music. I was obsessed and it helped me make a strong headstart, but it eventually mellowed out to a more sane pace. Besides I wanted to have a more balanced life, I called up my friends who thought I'd died.
I also think that I rushed through it, and left many holes in my skillset which I've had to backtrack to fill so I could be a more well rounded musician.
I think you've got the right idea and will do fine. If you have a few bucks to spare, or maybe could find a copy at the library, I would recommend the book "Mastery" by George Leonard. It's a little book, not directly to do with piano but has the best description of good practice habits and attitudes I've come across.