We are working on Tourist visas for my in-laws living in Mexico. My father-in-law filled out his DS-160 and was trying to schedule his interview. According to the page, the preferred location of Mexico city does not have available interviews at this time, but also all the other locations are at least a year out anyway.
1: Should we just select Mexico city and hope some availability opens soon for tourist visa interviews?
2: If we select Mexico city for example, can we later change this? Similarily doing the opposite and picking a location that is taking interviews and change to Mexico city if interviews become available.
3: Will we have to go back and change the DS-160 somehow if there is a change in interview location? Will this cause a problem?
Thanks in advance!