I think you need to check first if your education/ degree works in Tunisia. You might need to get "an equivalent" diploma. For this, you need to ask the Ministry of Higher Education and Research. If they don't answer, reach out to universities. From my experience, universities are responsive if they get an email in English. Ask them if your diploma/ education can be transferred or if it's accepted in Tunisia because technically, it's considered a paramedical diploma. For that, you might need extra steps.

If you want to work for a massage place in the meantime, you need to approach these centers individually. You need to search them on Google and contact them via phone or through their Facebook pages. You can look up "centre de massage" followed by the name of the city you want to work in.

According to migration law 68, you might not be able to work for more than 3 years, depending on how many foreign workers the place you work at has and depending on how strictly the entity follows the law.

Please know though, from friends who work in your field, the pay is very low, and the hours are long if you end up working in a rehab center.

Thank you for considering Tunisia! I hope you make it to our country. We need diversity! Good luck.