The first asana is discipline, I often think. It starts with going to bed early. This makes it easier to get up in the morning. The discipline to practice every day in the morning gets easier the more often this muscle is used. When a behaviour becomes a routine, a habit, less discipline is necessary.
For the time being it's very easy for me to practice. I came to the conclusion that it's better to practice yoga than not to practice. My practice is not pain free. So what.
This leads to the second mental state. It helps not to be involved that much in whatever one is doing. To observe what's happening is a great start to develop a cool attitude. Today kurmasana is possible, tomorrow not. Who cares?
To learn to focus and to change the focus is such a great skill also off the mat. I check my posture, I check if my asana is stable. Then I focus on the breath.
To have faith that daily practice will improve the practice helps a lot to have a long long breath. It can take years and decades till an asana looks fantastic (own view!). For critical yoginis this can take a bit longer than for those who are happy very fast and not so critical.
Today I focused on forward bending asanas. I alter primary with second series. What a joy when I realized that I could lift my body in kurmasana.
Tomorrow back bending is on the schedule.