a cool, dark place for between two and three months.
i'd say forget about your product until it's ready, but right now, it still needs a little work. for the first couple of weeks, shake the jar every day to make sure the sugar does its job rather than just sitting at the bottom of the jar. later, shake the jar at least once a week until the liquid inside is a deep mysterious purple.
after three months open the jar and taste the contents. add a little more sugar if the liqueur is not sweet enough for your taste, close the jar up again and shake well. leave for another couple 