Ok, so I guess I don´t have to worry
My frog likes crickets (dusted, gut loaded), roaches, small fish, woodlouses etc. I prefer feeding him with forceps (I don´t think it has something to do with force feeding, I just hold the food in front of his snout and he takes it by choice) because it´s easier to control the amount of food that way. I might change that as soon as I have more experience; he didn´t always eat properly in the past and I´m still new to this species after all.