sphagnum moss propagating

I received a trade of cuttings of a Philo Florida Ghost x Tortum hybrid, and the person I got it from said they mostly propagate in moss and had packaged it in a moss cup.

I am used to water propagating and willing to try moss, but am really scared of killing this prop! Can I keep it in a cup of moist sphagnum moss with the leaves exposed, or should I try to create a humidity "tent" by putting the cup inside of a freezer ziploc bag and keeping it closed?

also featured are cuttings of adansonii mint, philo micans mint, and a baby adansonii frozen freckle that I got in the same trade 😍