F2 will take you into the BIOS. F12 will get you to the boot manager. There’s an issue around quiet boot and quick boot being turned off that causes a freeze when hitting F12 - see here: Cannot load boot menu, laptop freezes - #11 by Quinn_Casey
At the least you should be able to get into the bios using F2, then you can set your boot order there. It’s a little “heavier” than F12 but it may get you going. Nevertheless, your arrow keys should work in the boot manager, too.
Best of luck, hopefully you are able to get things sorted out.