Could you post a screenshot of a game that has approximately the quality level that would satisfy your goal? Also what art style do you want?
As the title says "paid", how much payment do you have in mind and how quickly do you want it?
Hey, good questions. Style-wise think low poly / stylized, not photoreal. As long as it reads immediately as "volcanic island," we're good. Think beach, cliffs, active volcano with some particle FX on it, nothing crazy. I'll drop a couple refs below so we're on the same page.
Budget's $90–140, timeline's 5-7 days but I'm not in a rush, so don't stress the clock. Let me know if that's in your range.
Best reference: Sea of Thieves — The Devil's Roar Active volcanic islands, smoke, lava, tremors. Stylized but not cartoony. This is basically the vibe. https://www.google.com/search?q=Sea+of+Thieves+Devils+Roar+volcanic+islands&tbm=isch
Also good: Wind Waker — Dragon Roost Island Shows how beach/rock/volcano blend together on one island without looking messy. https://www.google.com/search?q=Wind+Waker+Dragon+Roost+Island&tbm=isch
For the real-world shape: Hawaii aerial shots https://www.google.com/search?q=hawaii+volcano+island+aerial+view&tbm=isch
For the game-art look: low poly volcanic island search https://www.google.com/search?q=low+poly+volcanic+island+game+environment&tbm=isch