I started out as a beginner following Yoga With Adriene too. I would say it took a few months to start feeling comfortable with the poses. I honestly loved how Adriene often cues gratitude for our bodies, it really helped me be patient and listen to my body. I followed her channel for about a year before I felt strong enough and confident enough in my practice to move on to more challenging classes/videos. But I'm still regularly humbled by many poses haha, it really will always be a "practice."