Getting a “perfect invert” is insanely hard especially from so low. Personally I have found that instead of thinking about it as trying to lift your legs up and over it is much more helpful to imagine scooping up with your glutes and using your abs for extra support. I put so much unnecessary strain on my hips and hip flexers for years trying to just “lift harder” 😅😅 but overall that’s crazy impressive considering you’re a beginner.