ESO's PVP is very fast-paced, and the TTK opponents is incredibly short, with some fights ending merely seconds after they started. Most of that damage, though, comes from a combination of many aspects of a build, such as your class, race, CP spread (account-wide leveling system once you hit level 50 on a character, you won't have to worry about CP yet), abilities, passives, weapons (for 2H and dual wield: swords offer a flat bonus to all damage done; axes offer an extra DOT for added pressure; maces/mauls offer extra armour penetration; daggers offer extra critical damage), gear sets, item traits, enchants, poisons, your specific ability combo when fighting other players, how well you play in general, etc.

You're missing basically all of that, only having a small portion of your class and race to play with, few abilities and passives, a very small selection of gear sets, item traits and enchants, the inability to choose which weapons you want to use, etc. You lack most of your class and race abilities and passives, most of the available gear sets, most of the item traits and enchants, poisons, the ability to freely choose which weapons you want to use, CP, a solid ability combo for fighting other players, and an understanding of how the game plays. These are huge losses, and will absolutely ruin your damage output.

As Vapirko said in their own way, you really can't expect to dish out solid damage when you've just started the game. Even if you had access to all the items and systems I've outlined above, you still can't expect to dish out solid damage in a consistent manner as you lack an understanding of how the game plays, and you lack a solid combo.

If you're serious when it comes to PVP, I'd recommend looking up some PVP gameplay, as what you'll experience now is in no way indicative of what PVP will be like once you're actually ready to jump into it.