How do you keep yourself accountable when studying for AWS Solutions Architect while working a full-time job?

Squeezing in 2 hours of study after a 9-to-5 workday requires immense willpower. Without a fixed schedule or peers expecting your progress, it’s easy to push test dates back by months.

For those who passed while working full-time: did you rely purely on personal discipline, or did you set up a study partner / accountability system?