The Ettenmoors: Travel to the Ettenmoors
After the conversation with Elrond, Gandalf and Aragorn you will unlock the [ACHIEVEMENT] Trusted with the Secret. You can have a chat with Gandalf and ask him about the details, but first of all talk to Elrond. You will get more information about the [SIDE QUEST] Cult of the Lidless Eye and - provided you acquired the Mysterious Aged Tome in the first chapter - you'll complete the [SIDE QUEST] The Seer's Words.
You will get two packages from Elrond. Unpack them in your inventory and choose your reward. There's a mirror on the left - you can change your character's appearance by using it. On the top of the stairs, to the left there's Aragorn with whom you can talk. Generally speaking, there are many well-known characters in Rivendell you can talk to. The guide will take you to all of them. Go downstairs and then use the stairs on the left to get to the lower part of Rivendell. Elladan and Elronhir are standing to the left.
Enter under the roof and go past the table to come across another well-known character - the Dwarf Gimli. Further, on the balcony, there's Frodo standing to the right. If you talk to him about the ring, you will unlock the [ACHIEVEMENT] Friend to the Ring-bearer.
Turn right and run up under the roof again. There's another Dwarf there - Gloin. Nearby there's also Elaure to whom you can talk. She functions as a merchant in Rivendell. Look through her items, because some are really worthy of attention.
Further, Bilbo Baggins is sitting on a stone bench. Talk to him and agree to help. You'll need to choose one from four answers, thus making his poem ready - you will receive a [SIDE QUEST] The Poet which you will complete right away if you talk to Arwen. She is standing on the bridge to the left. Agree to help her find some ingredients for the potion and you'll get another [SIDE QUEST] Miruvor.
If you run down the stairs that lead to the bridge, you will meet Legolas on the left, and a little further, on the same side there's a blacksmith, Angmir. You can repair your items, and if you've acquired all three Westernesse Artifacts then the blacksmith will be able to craft a weapon using them. Thus, you'll complete the [SIDE QUEST] Work of Westernesse. Talk to him about the details and ask about the jewels - you'll get a [SIDE QUEST] Elf-stones. Run on the bridge and use the glowing portal at its end to move to The Ettenmoors.