The article below is just a basic introduction to the topic. For something more advanced, written by pros and a fantastic leveling guide, my recommendation would be this Elder Scrolls Online Leveling Guide. I could not find any other guide that comes even close in terms of the impact it had on me.
None is more tougher than the Orcs (Orsimer). They make up one of the three members of the Daggerfall Covenant, under the guided leadership of High King Emeric.
Although they do not contain an in-depth knowledge of magic as their comrade-in-arms, the Bretons, the Orcs are far from being labeled at a disadvantage. Orcs live by a deep code of honor which states, the strongest will survive and the strongest will rule. Orcs come from a rigid homeland situated within the deepest and highest mountains of Tamriel. To survive, only the strong can do so by being physically and mentally prepped for anything.
Thus, through a treaty with Emeric, the Kingdom of Orsinium gained provincial status, solidifying their devotion and dedication to the new Daggerfall Covenant.
One of the main aspects about the Orcs is their ability to craft one of Tamriel’s finest weapons, sought by warriors all over the continent. Possessing the greatest smiths money could not buy, the Covenant will contain a ready supply of weapons and armor to win the war against the other two Alliances.