Minecraft Middle Earth is a Minecraft community that recreates the world described by JRR Tolkien and his writings. Everyone can participate in organized events in which we collaborate to create major landmarks, terrain, caves, castles, towns, farms and more.
You only need the ip address to access the server build.mcmiddleearth.com
also i would check your firewall settings if you cannot download the resource packs
Edit: sorry I misread, you need the full Java edition of Minecraft obtainable from Official site
Since I've bought Minecraft Java Edition (back when it was just Minecraft) I can download Windows10 Edition aka Minecraft for free so if you have bought Minecraft Windows10 Edition then maybe you can download Minecraft Java Edition for free as well? Idk.