All the topics I want to learn are in my Trello board. https://trello.com/b/cu32qF3q The cards that I assigned to myself I am learning now. Trello is great as by pressing Q I can only see the cards I have assigned to myself and focus in on learning them.
I've experimented with Trello in the past for this, but I always just ended up with a massive list on the board and spent an unreasonable amount of time antagonising over when cards should be considered finished.
Might be easy for "learn how to do X", but more difficult for broad topics like "learn rust"