A series of articles and videos by Unchained.com offers a substantial introduction and strategic management of UTXOs, particularly focusing on preserving privacy in Bitcoin transactions​1​ (https://unchained.com/blog/bitcoin-utxo-privacy/, https://unchained.com/blog/bitcoin-utxo-privacy/)

Coin Control Feature:

Manage UTXOs by performing "coin control" which allows selection of UTXOs to spend from. This feature is available in many Bitcoin wallet programs like Bluewallet and Electrum, enabling the management of Bitcoin funds into specific UTXOs for payments and others for holding (https://bitcoinnews.com/privacy/what-is-bitcoin-utxo/)

UTXOs' Role in Security and Efficiency:

UTXOs are fundamental to the security and efficiency of the Bitcoin network, securing assets without intermediaries, making Bitcoin a cost-efficient payment medium. (https://diba.io/blog/understanding-utxos/)

TXO Model:

Robots.net elaborates on the UTXO model and its advantages including the built-in solution for transaction fee calculations. (https://robots.net/ai/what-are-utxos-in-a-bitcoin-blockchain/)

the wicked red apple-guy and the brownhaired guy with blonde streak from Canada make great practical tutorials

the Noah w gray beard-guy does great at explaining in written form

you're welcome