I have spent hours doing research today and while I could pick at how the 3 alliences don't entirely make sense it is only because these guys created such a vast and brutal history in the first place, and have now been careful enough to make the setting far back enough to give themseleves some freedom of movement, so I won't go on about that I am certain there are hundreds of such threads right now that I could explore, instead I would like to take some time to ask some (mostly technical) questions and if someone with this knowledge and equal passion about these games were to come forth and answer some of them I would be entierly greatful!! Thank you in advance.
1) I have heard that to fully experience the game one will have to play at least 3 characters, one from every faction. Fair enough but what level of interaction will my primary character have with the remainder of the world? Will I be able to freely explore the rest of the continent? will there be large cities perhaps meant for trade between the varying factions, will I be able to perhaps travel through perilous enemy territory and make it into a safe haven such as one of these cities? wouldnt that be amazing? If 2/3 of the world is truly cut off from my main character I will be very dissapointed and I will feel like that is far from the spirit of the elder scrolls, where the most renown adventurers have been known to make pilgrimages into the most hellish and hostile of territories.
2) How will playing with friends impact my experience if we are not of the same faction? I have always (since morrowind naturally) loved the dark elves and that will be my first choice without a second of hesitation but my best friends are inclined to play Orc, another might play Khajiit etc. This one is a simple question: to properly interact together and quest/explore together will we have to share the same faction? Is it possible to make friends with members of other factions? Everyone should not have to think alike just because of current politics, woulndt that be AMAZING if you could create proper friendships and parties with anyone?
3) Those two are really my primary concerns at this point

That's about all from me for now, sorry about the length, would love to hear some answers as well as opinions from the community, Thanks!!