You need an embassy visa for Namibia if you have an Indian passport
Visa options for Namibia
Electronic visitor visa for Tourism
Travelers need a visa to visit Namibia for Tourism. A Namibian eVisa is the fastest and easiest way of obtaining a visa for Namibia because travelers can submit their application 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.