Good luck 
Yes, I enjoy languages; maybe I can write something to become a reference point for the people joining the community - nonetheless my advice would be bland and generic.
I like to break it down by techniques of SLA - so I think you can make progress in microlearning (small exercises like Anki, Duolingo) and in comprehensible input (beemind listening, repetition). In general I use beeminder to destroy backlogs - 30 podcast episodes explaining grammar - perfect use case.
In retrospective I think I could’ve done it much faster, for example investing in a tutor or moving to Spain, but speaking Spanish always has been a side quest.
Circling back to your original idea, the problem here is that it’s easier to do what’s measurable. Secondly, scope creep. Beeminder goals easily spill horizontally (one more language course). In other words, especially advancing mentally, spiritually requires depth. Moving to a different country, getting out of comfort zone. It is hard to model it with the red line (it never was a promise of beeminder anyway haha).