You have a strong, stable practice. You have also, without quite meaning to, built a relationship with that practice that is getting in the way of it.
You know how to meditate. You have been doing it for long enough that you have a sense of yourself as someone who meditates — and that sense, which is real and earned, is now functioning as a layer between you and the practice itself.
The 30-day track ahead does not flatter this. It is designed for practitioners who have stopped being beginners and need to find a way to become beginners again — not naively, but precisely. You will work with the experience of knowing what you are doing and watching that knowing become, temporarily, an obstacle.
What you have built is real. The track does not dismantle it. It teaches you to hold it more lightly.