Before you arrive in Namibia we would recommend learning a bit more about Namibian history. Namibia is a very multicultural country with a rich history. To not be surprised about the impact colonial history had on Namibia we would like everyone to do their own research besides the videos linked below.
A summary:
https://www.youtube.com/watch?v=Jim_NG0PYpc
About the German Genocide against the Herero:
https://www.youtube.com/watch?v=aBqC5SYYvks
About how Namibia got independent from South Africa in 1990: