You improve at what you do often and with mindful intent. You’re already doing that; what’s tripping you up is the guilt you feel at getting things wrong because it feels like you’re being dismissive of people.
But you’re not: you’re actively working on a problem you’ve identified you have, and for partially personal but also kind, interpersonal reasons. There’s no timeline or final grade to worry about, so just focus on enjoying your media and discernment will come to you.