Oh yes. I also started to get serious about one year ago. However, I have seldom had the opportunity to practice as much as you have; if I can get 1-2 hours in a day I consider myself lucky.
Now, my children are off from school and it is very hard for me getting the opportunity to practice at all without getting disturbed all the time. My son complains about my piano playing and tries to interrupt it whenever he sees me sit there, even though I have head phones. (He is diagnosed with authism and ADD.) I would like to play much more than I can today, and this makes me sad.
A way to get more practicising time, though, without being at the piano, is to practice in your head. I often sit down with the notes and read them and imagine that I'm playing. Don't underestimate the value of this kind of mental practice, I have realized it is very beneficial.
So - to overcome your depression, my advice is that you study WHAT YOU CAN, and also that you listen to a lot of piano music. Maybe you can take the opportunity to study some music theory? Or maybe get yourself another kind of instrument, like a flute or a guitar, and learn them instead. All of this will be good for your piano playing, so you are not wasting your time.