Basic information for those wishing to get started in Lord of the Rings Online. This is not meant to be exhaustive, merely to cover the most basic info.
Some basic terms that are useful to understand (this is not meant to be exhaustive):
There is one faction players are a part of for PvE: The Free Peoples of Middle-earth.
There are four races to choose from: Man (Humanity), Elves, Dwarves, and Hobbits. Each race has certain racial traits that affect the character's stats.
Within each race, you have the choice of the group/nationality to which you belong.
In addition to PvE, the Free Peoples may participate in PvP in the Ettenmoors.
It is also possible to play "monsters" serving Sauron in the Ettenmoors. These include Orcs, Trolls, wolves, and spiders. These servants of the enemy do battle with the Free Peoples for control of strategic points.
There are nine classes to choose from: Burglar, Captain, Champion, Guardian, Hunter, Lore-master, Mintrel, Rune-keeper, and Warden.
Certain classes are limited to certain races, while others can be played by all races.
Each class has 3 trait trees which allow them to perform different functions, or the same function in different ways.
There are four primary roles characters fulfill: Tank, Healer, Damage, and Support.
If you want to tank, you can be a:
If you want to heal, you can be a:
If you want to focus on damage, you can be a:
If you want to focus on supporting your allies, you can be a:
There are three armor types: Light, Medium, and Heavy.
Some classes start at a lower armor type, then graduate to their final armor type. You should be wearing the highest armour type you are able to.
You wear Light Armour if you are a:
You wear Medium Armour if you are a:
You wear Heavy Armour if you are a:
While generally any weapon you can equip with stats useful to your class will be good, some class and race traits do offer improvements to damage when wielding certain weapons, so you will want to take that into account when you pick them.
There are 5 attributes: Might, Agility, Vitality, Will, and Fate. While all will provide some benefit to all classes, your class and role will generally determine which of these are going to be most useful to you.
Secondary stats are broken down into Offence and Defence and are generally measured in ratings.
Offensive secondary stats are Critical Rating, Finesse, Physical Mastery, and Tactical Mastery.
Defensive secondary stats include Resistance, Critical Defense, and Incoming Healing.
There are four groups of Traits: Virtues, Race, Class, and Legendary.
Starting as you enter Moria, you will begin to get legendary items, which, when equipped, can level as you gain experience for them through quests and combat (among other things). Each level gives you points on that item to apply to various "legacies" that increase something about your character. You are able to trade out some of these legacies to ones more conducive to your style, and you can even socket runes or gems into them.
While legendary items can grow from experience, there is an upper limit, and once you've reached that limit, you will want to find a better legendary, either in terms of quality (determined by the "Age" it is from: Third, Second, or First), or by level (if your legendary isn't already from the highest level zones).
In Rohan, you get a horse, with a set of skills that allow for combat on that mount. There are three types of horses with different strengths in combat: light, medium, and heavy.