1. Got To https://minecraft.net/download

2.Look At The Multiplayer Section And Download It

3.Once Downloaded It Put It In A File Named 'Server'

4.And Open It Double Click The Java File And Wait

"This Is The Tricky Bit"

5.Go To CMD

6.And Type In ipconfig /all

7.Look For Your IPV4 Adress And Copy It Out

8.Now Thats Your Server IP

9.Ok Open Up Your Server Folder And Look For Server IP=paste your ip here

10.Go On To MInecraft And Put In The IP Your Should Join.

Easy Free Server Commands:
/Stop - Stop The Server
/op NAME
To Find More Commands On Your Server Do /help 1to9

Thxs For Reading Enjoy

And IF you Want To Make It Easier Then If You Are All On The Same Internet Router Then You Can Just Type local host as your ip.