Not “strong” glasses. Just whatever works best for you, that you enjoy for distance vision. In most cases around 1 diopter more than what works for around 60cm distance, differentials.
Also not required. Everything here is experimental! You can even just start with wearing in low light, night time, conditions where otherwise you really can’t see well at all.
I don’t know about this stars / eyes closed experience. If your eyes are closed, you’re definitely not doing active focus. 😉