I have hunted 20 times in Namibia and I really like this country.
It is very easy to bring a rifle over there, and since the Covid, your PH can also assist you to pick it up at the airport.
The country remains safe, one of the safest of Africa from what I was told.
There is a wide varieties of game to hunt, from the little Damara dik-dik up to elephant and including many emblematic species like oryx, kudu, warthog, springbok, hartman zebras...etc. Excepts for dangerous games where prices are very high, there are some exceptions of course, for plains game, it is pretty affordable to hunt in Namibia.
For small games, it depends the species, but the hunting season for birds is shorter than the one for big game that starts from the february 1st till the november 30th.
At the end of the year, I'm going to South Africa to see new territories and new species of game. But no doubt, I will return to Namibia in the future.