I know everyone is going to say - "Get a teacher". I'm currently living in China, so finding a teacher is not really an option.
I've been playing keyboard for a year now, and my sight reading isn't too bad. I don't hit incorrect notes often, and my timing isn't too bad as I often check it with a metronome. I realised that I haven't really been employing a proper keystroke. I know, this could have been avoided if I had a good teacher but, again, let me state that that's not really an option.
I've been reading Fundamentals of Piano Practice, as well as watching lots of youtube videos on the basic keystroke, and I think I'm executing it properly. My playing feels a lot more relaxed and musical now that I'm using it. I find that it's easy to use for chords, or slow passages, but I'm having trouble at faster tempos.
Also, I'm wondering about how I should start practicing scales. I know all my scales, but I want to practice them utilising a proper keystroke and I'm kind of confused about it. Do I play multiple notes with each drop, such as in 123, then 1234 in parallel sets? I've been practicing using a small gravity drop for each note, but at faster tempos it means my hand is jumping up and down a lot, and I don't think that is the correct method.
Please, I'm looking for serious advice on the matter, as I don't want to waste my time practicing incorrect technique. I really want to master this. I know that it's going to take me at least a year to get a proper feel for this technique, but any advice you can offer will be especially useful for me during the process.