I'm going to the gym every 51 minutes or so, but it's slow. What else can I do to help train my pet?

This board has all the stat boosters.

However, keep in mind that those can get very expensive and since the stats of your pet are currently pretty low, you may want to wait until later when it's more expensive to train to use them :)

You can use stat boosters. They are all listed here. http://www.subeta.net/forums/view/365840 But be warned it's really expensive and you would probably be better off to not use them till your pet can only do like two classes a day.