Welcome to the group! Lots of Good People here, and TONS of experience and knowledge!
You have a few options to pick from depending on your preference, and budget. The first two would be permanent:
1. Contact paper makes a transparent product that looks like the old school "privacy" glass. What you don't use makes good shelf liner.
2. You can replace the glass with a replacement privacy glass.
3. Camping World, has a slim line window shade specifically to fit your door.
https://www.campingworld.com/slim-sh...in-shade-black
Good Luck
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Pull Toy
Steve & Jan, Ava & Emma (Mini Schnauzers):
2016 F350 Lariat 4X4 Powerstroke CC/SB "PULLTOY V"
2013 Alpine 3535RE "MAGIC CARPET IV"
Proud Navy Vet!