I love cooking especially sweets but I'm not a professional.

This time I tried to make ready-to-roll icing for the first time to decorate cupcakes but it was horrible (I used crystallized sugar instead of icing sugar which I can't find and another kind of syrup instead of liquid glucose which i can't find either) so the dough was barely holding together.

So here is my question: What can I replace liquid glucose and icing sugar with?

PS. I live in a country where it is hard to find this kind of ingredients.