Which Windows 10 version is best suited for an old laptop?

The device is configured with an Intel Core i5-2450M processor, 6GB of RAM, an AMD Radeon HD 7450M graphics card, and a mechanical hard drive. Due to inability to connect to the company's identity-authenticated WiFi, a system upgrade is required. The primary use is document processing. Among versions such as Windows 10 LTSC 2019, LTSC 2021, and Windows 10 22H2, how should one select a version that balances smooth performance with functionality?