>>812753Leaves above water, also even when using that method, it's not a bad idea to use a plastic bag too to slow evaporation
You could try continuing with the wilted one, but if you have access to better cuttings/suckers, use those
The time to get roots varies extremely in my experience though, anything from 2 weeks to 3 months, so depending where you live it might be a little late now (or early if you want to clone over winter which I did last year), unless you're in the tropics of course
This is how it'll look like when roots appear, at this stage I put it in a pot (very carefully add the soil/press on to not damage the roots), which I thought might have been a bit early so I wrapped around a plastic bag for 10 more days (it was in very dark January behind window though at 50°N, so everything goes slower)