If she likes crickets then that's fine, they are a great staple. Give her as many as she wants, with calcium on them 3 X a week. Her temps. have to be above 90 for proper digestion, you can always use bulbs like these from Walmart. Many reptile keepers use these as heat bulbs. They are very inexpensive and always available.
https://www.beardeddragon.org/media/29993/full
https://www.beardeddragon.org/media/29993/full