Even more basic starter guide: http://esoacademy.com/eso-pvp-and-cyrodiil-guide/

To answer some of your questions and offer tips:

- it takes a while to learn PvP. You might want to group up. Running with a good group...especially one using mics...can teach you a lot. To find a group, once in Cyrodiil put out a some chat: /z LFG. Feel free to also state you’re a PvP noob.

- any character can PvP. If you have a main and are comfortable with him in PvE, that’s a good character to start with. There’s a big learning curve to PvP, and it takes time. If you decide you love PvP, then sure, you might develop a preference for another class or play style and make a PvP toon. My friend plays stamblade in PvE, but prefers magblade in PvP. But some players stick to one for both...it’s really up to you.

- regarding armor, you might be looking at outdated guides. Give yourself a little time to learn PvP before worrying about PvP-specific gear, but as a general rule light armor helps magic based abilities, medium helps stamina, and heavy tanks you up. I’m not sure what your build is going for precisely...as a healer / dps you’d usually lean magic character and wear a mix of heavy and light. It sounds like maybe you’re a new player who has a lot of the basic to learn...in which case you can wear heavy in PvP while you figure out your character.

- there are a ton of quests in Cyrodiil. They are almost all short, mindless quests to do when there’s no action. There’s no big storyline or particularly impressive rewards. They should all produce quest markers, though. Look in your journal quest log under “Cyrodiil”. In some cases you might need to fix your map to display objectives. Go into the map, scroll over (r2 on consoles) and turn on objectives...resources...battles. Pretty much you can turn everything on. If you want to quest in Cyrodiil, the best places are the five towns located throughout. The other random quests you pick up can send you a loooooooooooong way for little reward. There are also twelve dolmens and like 50 sky shards in Cyrodiil.

And feel free to ask any questions you come up with in the forums. I suggest staying in this section...players helping players. There are some PvP sections, but the talk there is a bit technical.

Welcome to Alliance War. You ran around in circles for a while having no idea what was happening and feeling totally confused. I hereby declare you a seasoned veteran of PvP.