Me and my friend got Minecraft Java and wanted to play singleplayer together now but we don't know how it works someone knows?
The easiest way is to create a free Minecraft server on aternos.org and then play it together.
You need a server for this. And logically you can only play singleplayer alone. ^^
Singleplayer for two… Made my Day xD
Are you both on the same network?
You need a server and server cost money but there are 2 server providers who have free servers because there are Aternos which are better for plugins in my opinion and then there's PloudOS because the servers run if you play without plugins in my opinion better.
If you open your world on the LAN (you can do it in the menu) and your friend uses the same network as you