Having trouble getting into bios.

Ive tried restarting my pc and holding left shift but it takes what it feels like 30+ minutes to do anything even then i have to turn my pc off bc nothing shows up. ive tried shutting my pc down and turning it back on spamming the delete key to boot up bios. Ive turned quick boot off which did nothing. im out of options and i need to get into bios to update it.