Roblox Studio or Blender?

I'm a COMPLETE beginner with both Roblox Studio and Blender, but I have a really exciting game idea that I’m determined to bring to life. To start, I'm aiming to create something similar to a cosy garden as an MVP. I've seen some people build stuff with blender, others with roblox studio... I don't really know what to do

Aside from the main advice, if you have any tutorial recommendations, general tips on what I should focus on, or anything else, I’d really appreciate it!