Just bought THE ELDER SCROLLS® ONLINE: ELSWEYR™ DIGITAL COLLECTOR’S EDITION, how do I play the previous ones? I thought the base game, Morrowind, and Summerset came with it.
If you bought ESO Elsweyr Collector's Edition - They should appear in your game. You just need to find them.
If you start the game and open your collection window (U short cmd on PC) select the last tab - "Stories".
There is all DLCs and expansions that you own. And you can start their main quests right away from there.
To find where the new quest is, open Journal (J for short cmd) select the quest you have just activated on Stories tab and press M to show it on the map. Ping Ping Ping! That's where you need to go. Expansions add among other stuff an entire new quest zone to the Tamriel map, so you simply have to go to the map and find the zone and start questing!
depending on your faction, go to your "faction main town" and start the hooded figure quest (1st main story) after that play through cadwels silver and gold, then travel to morrrowind and use the zone guild to start the main story line for that location, do the same for clockwork city, summerset, murkmire and finally elsweyr. not a perfect guide i know but hope it helps
Make sure that you bought the 'THE ELDER SCROLLS ONLINE: ELSWEYR COLLECTOR’S EDITION' not the 'THE ELDER SCROLLS ONLINE: ELSWEYR DIGITAL COLLECTOR’S EDITIONUPGRADE'. As you can see, only the full edition comes with Morrowind and Summerset, the Upgrade does not.
If you do indeed have the correct edition, you should have access to the base game, Morrowind and Summerset. To start your DLCs, follow @Countdownical 's advice 'If you start the game and open your collection window (U short cmd on PC) select the last tab - "Stories". There is all DLCs and expansions that you own. And you can start their main quests right away from there'
If you do not have the correct edition, you don't have access to the DLCs until you purchase them from the Crown Store, or until you subcribe to ESO+ which grants you access to all DLCs while you remain subscribed.