Ahh
See this is how I did it instead of instant coffee u should use brude black coffee and you just mix that with the non flavored gelatin and then you add two table spoons of sugar mix it all up until all the gelatin is gone then put it in a cup or something and leave it in the fridge for about four hours if that doesn't work try another hour
And then when it's done you carefully get it out of the cup you can just set the cup upside down on a plate and then you spray whip cream on it and add powder sugar and done :>

I'm bad with instructions so I'm sorry if this doesn't help-

Also don't add all the gelatin just add one table spoons of the gelatin