[quote=@Lucius Cypher]
Without rage I don't have a health pool big enough to be a meatsheild, so I won't be dual wielding. If it's 1v1 I think I can wear him down through grapple and face punches.

[@Hekazu] could I possibly hold my kerambit in my shield hand? I'd like to think that the small dagger, with the ring hilt for extra grip, could be held in the same arm holding my shield. This way one hand can be used to grab the half-dragon and the they could be used to slash him up without sacrificing the protection of my shield.
[/quote]

I am afraid that allowing one to wield a weapon in the same hand as their shield would be breaking game mechanics. As things are, that cannot be allowed. But when it comes to the disarming attack, that works! Let me quote the DMG Variant rule for you:
[quote]
[h3]Disarm[/h3]
A creature can use a weapon attack to knock a weapon or another item from a target's grasp. The attacker makes an attack roll contested by the target's Strength (Athletics) check or Dexterity (Acrobatics) check. If the attacker wins the contest, the attack causes no damage or other ill effect, but the defender drops the item.

The attacker has disadvantage on its attack roll if the target is holding the item with two or more hands. The target has advantage on its ability check if it is larger than the attacking creature, or disadvantage if it is smaller.
[/quote]
Now, Battlemaster Fighters have their own manoeuvre for this, which can be easier or harder to land, but they have the option in case anyone ever encounters a game where this variant rule will not be taken into effect.