How can I effectively implement a self-testing strategy for my upcoming cognitive psychology exam, while balancing work and study responsibilities before the tight deadline?

I'm a master's student in cognitive psychology, currently working part-time while taking 2 courses, including research methods and statistics. I need to complete a comprehensive exam with a rubric that emphasizes the effective use of self-testing techniques to optimize learning. I've researched the literature on this topic, but I'm struggling to apply the strategies to my own study routine. I'm unsure how to prioritize self-testing without overcommitting my time and impacting my work responsibilities, and what specific tools or apps would be most helpful for implementing this strategy within my limited budget of $50 for study aids.