I'm not sure what kind of frog it is either. But a few overall frog keeping advice...

Be sure to dechlorinate all water used for him. There are lots of choices. I use Stress Coat. You can also check the amphibian row at your local pet store.

The crickets should be no larger than the distance between your frogs eyes. You should dust the crickets every other day with calcium/vitamin D 3 powder made for amphibians. I use Flukers brand, but there are others. I also sprinkle my crickets with an amphibian multivitamin every Sunday. You can use a baggy...put the crickets in with a small pinch and gently shake them a bit to coat them.

Be sure to wash your hands very well and leave no residues on your hands. Be sure to dry thoroughly bc the chlorine in our water is toxic to them. Also wash your hands after handling your frog.

Remember, we are big and scary to our frogs so handling and holding them should be minimized to prevent stressing them.

Often, having three sides of your tank covered will decrease their stress. There are many options.

For now, I would mimic the natural temps you found your frog in outdoors until someone can answer which type of frog he is. There are heating options such as side heating mats which stick to the sides of a glass tank and overhead heat lamps.

Humidity also has to be monitored. You may have to spray his enclosure, with dechlorinated water, based on his needs.

A good start is to have Eco earth substrate and a water bowl only filled to his chin (dechlorinated water). It will give him options.

Your best bet is to find out which species he is bc each frog has specific needs.

Cute frog! Good luck and I hope someone can tell you what type he is .