I've been studying up on disarm interactions, and how you might be able to pick up a weapon after you disarmed your enemy of it.
The issue I'm facing is: none of the threads I'm seeing mention anything about what it takes to interact with an object (in particular, pick it up and stash it in your inventory) when your hands are full.
That brings me to question 1:
If, I can supposedly just pick up the enemies weapon after I knock it out of his hands, does it take having a free hand?
If I knocked a weapon out of an enemy's hands while wielding a weapon and a shield, can I just pick his weapon up and stash it? Or would it pretty much require me dropping my weapon to pick his up (effectively making disarm pointless if I attempt it on my own if what I am holding is better than, or equal to, what he has)?
second question: It takes an action to don or doff a shield; can one don a shield from their back without using an item interaction to have it in hand? I'm wondering if I have a shield on my person, but not in hand, and disarmed an enemy, assuming it takes the use object interaction to pick up his weapon (and another to stow it). Then, on the following turn, can I stow the weapon I picked up with my object interaction action, and use my action to don a shield (without an object interaction to take my shield out)?