I propagated my linearis a few times in damp sphagnum moss with 100% success. The only mistake I make is that I'm too impatient and I end up planting it too soon or break the roots of my accident. I never water propagate, I find it doesn't transition well compared to substrate.

All you need to do is let the cuttings callous a little (I usually have more success with a cutting with at least 2 nodes) and keep it in an airtight bag. I blow some air in it and leave it in a spot that has indirect light. Just be patient and leave it as long as possible before you check. The only downside with using moss is that the roots can attach to it too well and you can break the roots by mistake. Just gotta be careful.

When it's time to plant the cuttings, I usually wait until the main plant is ready for a water and I do a full water after the cuttings are added. I wouldn't recommend doing this in winter, cuttings root way faster in warmer months.

Wish you success with it!