Hi Skyler. I'm Greg, 10 years awarded Windows MVP, here to help you.
The BIOS Boot menu key for HP is ESC or F10, should be printed right on the BIOS splash screen unless it has Fast Boot enabled, which might also bypass the chance to trigger the menu. In that case you need to enter BIOS Setup via the Windows Recovery menu here:
https://www.onmsft.com/how-to/enter-into-bios-i...
BUT....Secure Boot is necessary for Windows 11 advanced Security features to work properly. Why are you disabling it? I would only do it temporarily because it will defeat the purpose of the added Security layers that Windows 11 has.
Feel free to ask back any questions. Based on the results you post back I may have other suggestions if necessary.
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