When you take the Attack action and attack with a melee weapon (doesn't need to be light) that you’re holding in one hand, you can make an additional attack with a different melee weapon (doesn't need to be light) that you’re holding in the other hand (this additional attack does not use a bonus action, however you cannot then use a bonus action to attack again as part of Two-Weapon Fighting). You don’t add your ability modifier to the damage of the bonus attack, unless that modifier is negative.
If either weapon has the thrown property, you can throw the weapon, instead of making a melee attack with it.
In addition, you can draw or stow two one-handed weapons when you would normally be able to draw or stow only one.