Only 20 minutes a day: Is focusing on verb compounds actually efficient?

I’m a busy professional and I only have a short window each morning to study. I’ve been trying to memorize long lists of compound verbs like 'anjam dadan' (to do) or 'tamas gereftan' (to call), but it feels like I'm not making progress. Is there a better way to use these 20 minutes to improve my output, or should I just focus on learning the most common verbs first? I am asking specifically about learning Persian, not a generic study routine.