American trying to work on a cruise line

I understand that the pay is subpar and that most lines usually avoid Americans. 35 year old male,I recently lost my job on land due to epilepsy, rather lost my CDL which cost me my job. My epilepsy has been fully under control by medication for the past year. I have 15 years of experience in bartending and in almost every type of security with leadership and instructor positions. I also have a couple months of travel sales and 6 years in childcare/ transportation. Would I be more likely to get hired applying for a supervisor role in one of these positions or is that something that generally goes through seniority? I'm trying to buy a year or two without living expenses regardless of cost until I can figure out where to go from here, as everywhere on land finds an excuse not to hire me as a liability. How would I go about wording this, if I can get that far?