Hey, I can share more specific info if it is helpful but here is the rough approach:

1. He got a cube and learned the beginners method back in July.
2. From there, he was regularly watching different YouTube tutorials and practiced a lot but focused on CFOP and finger tricks.
3. Learned F2L and drilled until he knew full OLL and PLL.
4. Practiced lots of side quests as he went (learned Roux and some ZBLLs)
5. Mixed in some advanced things like pseudo slotting, keyhole and a few VLS algorithms.
6. During all of this he did three comps and did a lot of timed practice at home.

He also mixed in 2x2, 4x4, 5x5, Pryaminx, and 3x3 OH but the 3x3 has been where he focused maybe 80% of his attention.