I need help with my dimension spawning

Hey everyone,

I'm working on a custom dimension setup and running into some trouble with player spawning. I want players to spawn directly into a specific dimension when they join the world—not the Overworld—and I want the world spawn to be set in that dimension as well.

Here’s what I’m trying to achieve:

• When a player joins the world for the first time, they should be sent to my custom dimension.
• The world spawn should be set in that dimension, so respawns also happen there.
• Most importantly, I want players to spawn on solid land—not inside blocks, underground, or in water.

I’m not looking to teleport players every time they die or use portals—just a one-time setup when they first join that sets the world spawn and places them safely on land in the custom dimension.

If anyone has experience with dimension management, spawn logic, or knows how to ensure safe land spawning, I’d really appreciate your help!

Thanks in advance! (p.s. Pls send screen shots)