Hello and welcome, Rattus
Dubia roaches are an easy roach colony to keep and will save you money once it's multiplying.
I'm not a fan of mealworms, as their segments are made of chitin and will not break down when the frog digests them. It can lead to intestinal obstructions.
Night crawlers and earth worms from a safe, clean source are the best staple foods.
Dubias are great too, especially if you feed them fresh fruits and orange and leafy-green veggies

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Congrats on your new frog!
Have you found our care sheet section?