With the right precautions and gradual approach, there is a fisting dildo for novices that is specifically tailored to safety.
It should also involve the following; relaxation, proper lubrication, using smaller toys, and progressing through to a fist dildo.
Yes, the fisting dildos are to be used with care for vaginal and anal stimulation, but only if the size is convenient.
Wipe it with mild soap and warm water, and dry it thoroughly, and adhere to the care instructions of the material used.
Lubricants that are water-based or silicone-based are advisable for a fisting dildo, and it will depend on the material of the fisting dildo.