Help With Round Dynamic World Plz

Hello, This is my First post so I don’t know if this is in the right place so sorry if its not.

I have an idea of a game but it realizes on an idea that I don’t know if it is possible in the engine or not.The basic idea is have a round world (Ex Earth) I know it would take alot for it to run but I have a way to fix that.

I just want to know if and how I could do it.

Planned to have continent, Oceans, dynamic weather and other things