The jiffi cubes are better as you have seen, and the technique is slightly different for each medium.

You are required to soak your cubes before use the squeeze off the excess water. You shouldn't keep them too damp.

You shouldn't need to add any feed yet. Maybe all you might need is a little drop of root hormone (hygrozyme).

you haven't really asked any specific questions... Heng on I'll read it again...