Good, Yes a tray or container of soil or sand with ramps leading up or Buy Eggflats to build up to level of tray or container for easy access. The soil should be kept moist and I have found that a screen over the soil will allow the females to deposit eggs while preventing cannibalism of the eggs (It happens) Keep a practice of feeding more males than females to your fbt and or other pets. The females will do fine with just a few males to breed with. Now Crickets need at the least 70 degrees F, However they prefer 80 degrees and even up to 85 for breeding. The higher the temps (Up to about 85) the faster they cycle ie: breed, feed, live and die, I have found I can extend the lifespan of my crickets by weeks by simply lowering temps from high range although this will slow down there breeding and activity.
Make sure you keep the soil moist. After a week or so remove the soil. You should see eggs like tiny grains of rice. Cover the tray well and incubate at 80-85 degrees. Keep the soil moist so the eggs do not dessicate. Dry eggs will not hatch. Soon you will have pinheads emerging wait a few days for them all to hatch and then provide them with a moist veggie or fruit and transfer them to a totally separate container for raising (No adults) With a few hundred crickets you can have thousands of crickets so you can learn to control their growth and breeding by manipulating variables. Need less crickets? allow the eggtray to remain with adults for shorter time so less eggs are laid etc. When crickets start from pinheads their lifespan is much longer than when you get them at later stages.
there are a lot of good articles and guides online however there are always some nuances that cannot be covered in that case If you have questions I will always make myself available so feel free to contact me.
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Hope this helps