What is the most logical next event?

How to convince your parents to buy you a guinea pig
Learn everything you can about guinea pigs.
Research all the pertinent information that goes into taking care of them. You should be equipped with an arsenal of knowledge so you can respond to any questions your parents ask you about guinea pigs.
A few facts about guinea pigs to get you started are : Guinea pigs live about five to six years and are very social creatures. A cage for a guinea pig should be at least two feet wide by four feet long for each guinea pig.