Sounds like you are trying too hard - we all do this, especially at the beginning.
First, just find a comfy position that you can stay with for a while that keeps your back and your neck straight so you stay alert.
Scan over your body and notice where you are tense - usual places are around the jaw, in the chest and stomach and in the legs. Take a slow fairly deep breath and let it out slowly.
Start with either the mantra or the breath - you don't need to coordinate them. Follow Michael's instructions if you are using mantra.
You can use Lifeflow just watching the breath also - if you'd like to try, here's one way.
Allow your attention to come to the breath and note it coming in and going out, notice what is happening but don't try to change it. Is it deep?, shallow? regular? irregular? is there a slight pause between breathing in and breathing out - there's lots to notice. If the mind drifts off just return it gently to the breath when you become aware it has drifted.
If your eye does not close and you can't ignore the light then keep your eyes open slightly and just look at the floor. Things are always changing - allow this to change in its own time.
Be gentle with yourself - this is a lifetime adventure and there's lots of learning and lots of ups and downs. The more you can smile at yourself, the more fun it is.
peace and joy
