yes i used the forge installer and yes installed the server option. when you open the forge universal file then you get the eula file where you have to set eula true. then i lauched minecraft server 1.12.2 an loaded the rest of the world and got the rest of the sever files, then i put the mods in the mods folder then i did the portforwording and lauched minecraft and joined the server. when i got in on the server there was only one mod that worked and that was one that gives mobs healhbars the rest of the mods was set on you need these mods to use these items
and sorry for my english