Question about Rocketbook Everlast

Basically it doesn't matter... The only thing is that the paint takes a little longer to dry, so I can imagine that there is a risk of smudging, depending on the position of the hand?

Well, I don't think the answer is correct. The Rocketbook has plastic "pages". Contrary to claims, these do not feel a bit like paper and the pens take a good while to dry. So I would personally issue an explicit warning about this product for left-handers.