There may be some helpfulness by starting in verbose 'single-user' mode to see what
the mac is doing. However that may not be so useful unless you can understand it.
"..If you're an advanced user who is comfortable with UNIX -- you could use
'single-user' mode or 'verbose mode' to help isolate issues related to startup."
• Troubleshoot Your Mac With These Hidden Startup Options - howtogeek

https://www.howtogeek.com/189104/troubleshoot-your-mac-with-these-hidden-startup-options/
• Boot into Mac OS X Verbose Mode - osxdaily
https://osxdaily.com/2011/03/31/boot-into-mac-os-x-verbose-mode/
• Start up your Mac in single-user mode or verbose mode - Apple Support
https://support.apple.com/en-us/HT201573
(alternate steps in above Apple article replace original Command-S method, in current Mac computers.)
newer macs use Apple T2 Security Chip instead of older traditional methods to control certain aspects
• Mac startup key combinations - Apple Support
https://support.apple.com/en-us/HT201255
The command line or terminal could invoke harder to read or understand features in unix; behind macOS.
For some items, you may try Safe mode on startup, to sort details and for troubleshooting, in simpler form.
Good luck & happy trails!🌻🐝