It's not going to be a pleasant experience. You'll lost a good fraction of your typing speed for a while too. If you're not in pain, I'd suggest carrying on as you are, but since you seem pretty committed and it would be easier with multiple layers.
Try blanking the keycaps on the right side.
Those exercises are pretty naff because of the qwerty layout. You need to develop muscle memory, so exercises are pretty much the only way to touch type. Sadly, I'd be surprised if any of the tutorials covered improving your typing on just one hand.
This is the perfect time to consider a new layout. Both Dvorak and Colemak make much better use of the home row and are much more comfortable to use than qwerty once you've adapted. If you are going to relearn, you could be learning a better layout.
Good luck!