Hello and welcome to the forums.
I seen that cheese making kit just prior to joining this forum today and the reviews are all good for the product. Also it looks like it might be a toy with all of the colors and I know my daughter will go crazy just to open it up ha ha.
Cheese, I've seen lots of documentaries on the subject, looked online and read books etc and I think it was simply the amount of time that it takes to get a great aged cheese that kind of put me off until now since I'm much older I can do this for a lot of reasons.
One super important detail one should never miss is sterilization in making cheese, or any dairy product. It may look clean but you must never ever take it for granted and so I would completely boil water on everything possible before you start. That should help eliminate a lot of problems.