If you have any specific questions or just need assistance in-game, feel free to post here. For general information about pretty much anything in-game, here are some resources:

• FFXIclopedia: The original Wiki. Slow to update with the new things, but pretty robust for everything pre-Abyssea.
• BlueGartr Wiki: Fairly sparse on item information and user discussion, but an excellent resource for NeoDynamis, NeoNyzul, and pretty much every other post-Abyssea event.
• GamerEscape Wiki: Supposed to be the replacement/continuation of the original Wiki, but I don't use it too much, so not sure how it compares.
• Weather Forecast: No one really uses the bazaar features here, but the Weather Forecast is pretty good. Missing a couple zones, but overall not too bad. Basically the same information you can get from the Moogle Almanac/Any In-game Weather Forecaster, but you don't have to travel around to get it. Great for Magian Trials!
• Skymaps: If you're interested in fighting the Gods, this is a mirror of an old JP site with interactive maps of Sky (Ru'Aun, Ru'Avitau, Ve'Lugannon). Just click on the NM's name and follow the path. Click "Next" to proceed to the next map.