lemme know if you have questions. We use the king size corn tortillas as the regular as just to small for us.
You can also heat/soften corn tortillas individually in a skillet of hot corn oil, drain then roll. Faster in the microwave but dont get the extra flavor from cooking in the oil.
Make sure to separate each tort with a paper towel when heating a stack in the micro so they dont stick. Depends on brand as well.
Damp towel around torts is important as well in micro so they dont dry out. heat on a lower power setting to just steaming.