That's exciting news! I should take a look at this when I have time.

My own preferred training methods are delineated on the BigBag Training page, but my daily routine is described under "Still … What Do YOU Use?" on the front page. There's also a section on typing games on the "Trickery" page.

I'm not a proper speed typist, as 80 WPM or so seems to be my (glass?) ceiling for full text typing. But I have a lot of mileage and experience with the communities, and I've listened to and talked with some of the best we have. So please take a look around the BigBag.

Basically, what I've found very useful for learning and training has been:
– Pangram training a la Sophie, for the initial learning phase (kudos for including that).
    – I prefer "The quick brown fox...", as it features the common 'THE' twice.
– A round or two of MonkeyType, with the 10k word list and Zipf for pseudo-realistic typing. For speed training.
– BurstType, to train typing single words fast.
– Typecelerate, to analyze and focus on weak n-grams.
– EnterTrained, to rack up mileage while reading interesting books so it never gets boring.
– The occasional typing game, which also trains various aspects in an entertaining way.

What I haven't wanted to do, unlike many other learners who use Keybr, is a strict key-by-key approach. I guess that's just too boring for me? Also, with the pangrams I quickly learnt the key positions and could progress to learning actual common bigrams which is what you really need to get in place for efficient typing. I also hear that Keybr users grow frustrated after a while, as progress slows down a lot and drilling a letter becomes a drudge once you've learnt the first ones.

In fact, I think that the "most used keys" approach is less useful than people think. The most frequent keys may give you most stress initially, but then they cease to do so while the less common keys keep tripping you up for a much longer time. So I believe in training all keys more or less equally, or at least not ignoring the less common ones. Bigrams is an entirely different matter: There, I do believe in training the most common ones at first!

Another issue is keys that not all key moves are created equal. Shai Coleman chose to move as few keys as possible between hands, and even between fingers where that was simple to do. I can attest to that: The R-S key pair is what trips up the most new learners, as they "castle" from their QWERTY positions (index-middle) to their Colemak ones (middle-index). And when trying out a Graphite variant coming from Colemak, the keys that swap hands (L F M P) and fingers (vowels) proved much harder to get in place.