Jose, you don't want to deal with crickets, trust me.
First - many people (maybe most) are allergic to some combination of crickets and the various microorganisms/molds/etc. that come with them.
Second - they smell heinous. Even if you keep them clean, they reek. And good luck keeping them clean without ending up with loudly chirping escapees in your house.
Third - They are noisy.
Fourth - They escape and are then noisy and you can't get rid of them.
To actually breed/culture them you'd need some sort of substrate because they lay their eggs in the dirt. Young crickets take a bit of time to grow into adult crickets and, in cramped conditions, the adults may snack on them along the way.
You're much better off with meal worms. The beetles are edible, easy to raise, and breed readily. The cultures are easier to keep and smell better - just some corn cob bedding and cereal in a bin. Plus, you can feed the worms to your fish, too.