I want to start playing Skyrim for the first time but I'm a little confused. I'm not sure if activating any of the DLCs (Dawnguard, Dragonborn and Hearthfire) will affect the original storyline and side quests.
If yes, in what order should I use the DLCs?
If no, can I use them all at once?
DLCs in question: Dawnguard, Dragonborn and Hearthfire
Thanks!