Animation Help

So I was trying to make an Animation for My Sims where you have to Equip and Unequip an accessory/object... How would I go about doing so? is there any tutorials? or do I have to code it? Because I can do that. Like in SACRIFICIAL's Mods With the Animations... Also, how would I make The Animation Override The Proposal Animation?

Thanks In Advance!,
Bzeebee