Yeah so i play EP as well, the only thing you cannot do cross-faction is open world pvp (cyrodiil) otherwise faction doesnt really matter, only the races available to you (unless you get the adventurer pack, which allows you to play any race in any alliance, i highly recommend getting this from the crown store)
Some things i would recommend getting are the above mentioned Adventurer pack, as well as an ESO Plus subscription. $15/month gets you $15 worth of crowns (every month) access to all DLC (with the exception of summerset and elsweyr) and a crafting bag which is the best quality of life upgrade there is in the game.
Even if you dont know if you want to play long-term i would still get eso plus, it will make your playing time much more enjoyable as you wont have to go to clear you inventory every couple hours
This post was edited by AU5TIN on Apr 8 2019 10:15pm