About the order of quests & Coldharbour...

[AC Denton]

What's the actual order of the quests and where do they cross over?
I came back to ESO after a while and have my quest log full and honestly no idea if I should be doing what I am.

I'm doing the questline for Coldharbour, I just arrived in The Hollow City but I'm not sure if I should even be here? I thought Coldharbor was DLC yet the game just sort of walked me into it.

Rambling:
The one thing that annoys me about this is it lets you do quests you logically shouldn't be doing. I met Naryu for the first time and she spoke to me as if she already knew me, then later I met her in another zone and she spoke to me as if I was a stranger. Turns out I went to the wrong zone first and it messes up the story dialogue.

I'm just really confused about what I've done & what I should do next. What should be done before coldharbor?

[Drake]

Coldharbour is the main game last region. Back when there was a region lock, you were supposed to go there after you almost finished the main quest and did all 5 regions of your alliance.
Like for example if you were in the daggerfall covenant you has to do glenumbra, stormhaven, rivenspire, alik'r desert and bangkorai before going to coldharbour.

That's the other. After that it's in release order of patches and dlc : craglorn, imperial city, orsinium, dark brotherhood, thieves' guild, both shadows of the hist dungeons, morrowind, horns of the reach dungeons, clockwork city, dragon bones dungeons, and finally summerset.

[AC Denton]

Thank you! I'll leave it and come back to Coldharbour later then, thanks for the DLC list order too.

[Psyringe]

Coldharbour is the last section of the main quest. So in terms of story progression, after you've dealt with Mannimarco, you go to Coldharbour and the Hollow City.

Coldharbour was never a DLC - perhaps you mixed it up with Craglorn?

You do meet many NPCs in Coldharbour that you may have met in Tamriel already. Also, after you've completed everything in Coldharbour, certain events in Tamriel won't make sense - they shouldn't be happening any more, but still do. This is an issue of "Gameplay trumps story" - no one would complete Coldharbour if that would lock you out of important events in Tamriel.

Due to the above, story-wise it makes the most sense to go to Coldharbour after you're done eveything in your own faction. Then complete Coldharbour, and then go to the next faction.

However, you can go anywhere at any time, and the bumps in the story are not too egregious if you decide to do Coldharbour earlier.