You can do the same thing where you configure it to just one key, start with the basic triads, etc.
However, meanwhile I am learning the basic skills - starting with chord progressions in different keys (and as a side effect learning different scales) - and I am able to enjoy learning and playing music without the stress and anxiety of sight reading.
I have found a teacher (online from London) who follows this harmony first approach - and it has really changed the game for me.
Different approach and journey - but the destination is probably the same.
Playing with other people also highlights other perhaps unexpected skills. I played in a band for a while and I still retain the skill of reading chords off other player's hands. You also need to be able to respond to someone just shouting "OK, let's go to C minor" in ways that only matter in that context. When you're listening or sight reading, you don't need names.
That is why JazzSkills.com really worked for me. You can find several free videos on their YouTube channel - https://m.youtube.com/@JazzSkills
I almost gave up on learning and playing music after struggling for years / decades - and by happenstance came across JazzSkills few years ago. And since then every single day I get joy in learning and playing music.
Nothing quite as crushing as seeing people sight read things that would take you months/years to learn with the score... :)
Thanks for sharing your journey!
I'm not tracking my music practice (maybe I should) but I've been wearing a health tracker for years and have collected a ton of data. None of it seems very actionable because there have been no surprises.