I'm new to UE, and I'm teaching myself at the moment; and soon I'm hoping to create a very large, open world for use in D&D games with friends.

I'm curious what the practical limits are on the size of a landscape/map before problems happen; and what problems are the ones to happen. I have a very capable laptop that i'm using, it has an i7, and a laptop 3050 ti, as well as 32gb of CPU RAM, and 1.5tb of storage; but not everyone has something this powerful.

File size obviously increases, does it get so big that computers can't play the final game? Or will my computer just not be able to handle it in the editor?

Is there some practical unit of area that I should stay under, in order to avoid issues? How much does this limit decrease with the addition of more terrain things like trees, or buildings?

I am new, am I just asking the wrong kind of questions? Wouldn't be the first time I've done that.