What steps do I need to take to change our visa to an Ed and Guardian visa in Thailand without leaving the country?

The user is seeking guidance on changing their and their daughter's visa to an Education (ED) and Guardian visa after the husband's job loss. They plan to obtain a letter from the school and inquire about the process of canceling their current family visa, whether this change can be done without leaving Thailand, and the typical duration for this visa change. Comments provide insights on required documents such as a bank statement and the possibility of needing to leave the country for the Guardian visa application.