I love that article, it changed a lot of my thinking regarding people's potential for success. Woz has a lot of other articles you might also find interesting here: https://supermemo.guru/wiki/SuperMemo_Guru. I've especially read through a lot of his articles on sleep and memory and found them invaluable.

SuperMemo's interface was not designed with the beginner in mind. When I first started trying it even basic operations frustrated me to no end. But now that I use it as a high(er) level user, it feels very very intuitive and you start to understand why it was designed in a way that looks so unappealing at first. If you do decide to try it again, I would highly recommend joining the SM discord server (https://discordapp.com/invite/pB7jcSK). There are a lot of very helpful people there.