What race for which setup?
What race should you choose to have the optimal passives for your setup. Here are some recommendations and explanations for pve:
Best choice: Nord and Argonian
The best choice for a tank race is a Nord or an Argonian. Argonians have superior resource management because of their Potion passive. With a click of a button they restore 4000 extra magicka, health and stamina on top of the potion effects, which makes them the best beginner race for tanks. You also gain extra health on top of that.
Nords on the other hand have increased ultimate regeneration, which becomes more and more important in endgame and makes them therefore the best tanks in endgame.
Best choice: Breton, High Elf and Argonian
Breton, High Elf and Argonian are all very good healer races. Bretons have the overall best sustain by far. High Elf and Argonians are not far behind in terms of healing output which makes them also viable races for healers.
Magicka Damage Dealer
Best choice: High Elf, Dark Elf, Breton
High Elf and Dark Elf have the highest overall damage due to their Spell Damage and Max Magicka passives. Breton is not far behind but has way better overall sustain. As a new player I would recommend choosing a Breton to help with sustain.
Stamina Damage Dealer
Best choice: Orc, Redguard, Dark Elf, Kahjiit
As a stamina damage dealer Orcs have the best stats, followed up by races like Redguards, Dark Elves and Khajiits. All are viable choices, so you can pick whichever race you like the most.
In PvP the builds and races are usually more diverse than in PVE, therefore it is quite tricky to suggest races. I recommend reading through the races to see what kind of race would suit you best for your build or idea.
All Races for any Faction
I highly recommend buying the “All races any faction perk”, this will allow you to use any race in any faction. So you are not locked to the certain alliances. For example this way you could use a Redguard in the Ebonheart Pact, even tho Redguard is usually in the Daggerfall alliance.