You need a visa for Fiji if you have a Myanmar passport
Visa options for Fiji
Electronic visitor visa
Travelers need a visa to visit Fiji for Business or Tourism. A Fiji eVisa is the fastest and easiest way of obtaining a visa for Fiji because travelers can submit their applications and supporting documents online. Once the application is approved, travelers receive their eVisa confirmation electronically. A valid visa is required to board the flight. If the visa is expired or doesn’t match the traveler’s passport information, travelers will not be able to board their flight.
This is not offered by sherpa°.
Apply on the government site.