i like to think of utxos as individual bills in my wallet, i buy somthing that cost 3$, i can give the cashier either 3 1$ bills or i can give them a 5, either way they keep that bill 'its destroyed' and give me change, a new utxo.
strictly just for understanding the utxo model has alot of other stuff thats over my head, but i think this is the req knowledge, at least one of the most important