As you are a killie(virgin) I'll be gentle.
Use an airline and syphon off the eggs, and put the eggs into it and floating a container, (ice-cream) using the same water.
Now put a thin layer of you gravel, after it has been boiled, into the bottom of the tank, this will act as a protection for more eggs that will be laid, and you can easily retrieve these eggs using a gravel vac.
Eggs should hatch in about 14 days, maybe sooner, depending on the temperature.
If your house is warm, the container could be kept in the lounge, usually the warmest, and watch the progress from there.
Amazingly, you can watch these little fellas progress right from a clear egg thru to two little black spots, eyes, through to a wriggling little fish trying to break out from its tiny prison.
Or you could set them up on damp peat and then add water to the peat in 21 days and have them all hatch out at the same time.
Now you can see why I have been so enthralled with these little fellas for over quarter of a century. Also in the same club, NZKA, for that period of time.
Now I hope for a certain member that use to belong to this forum, that now only comes in as HIDDEN, will see that I do share my knowledge, as I have done so over the years.