I am glad that the process will be simplified in the future. I had trouble the last time that I was trying to make Virtualbox compatible with secure boot (Error when using whonix linux installer - #2 by qtzvytqr77x4t5cq). But now I switched distributions and computers. So this time, I figured I would document the process that I took in case it would help others in the future.
It might be worth mentioning that as of right now, the version of virtualbox provided by Ubuntu 24.04 LTS and distributions downstream of that (Linux Mint, Zorin OS, etc.) is apparently incompatible with the recent kernel update 6.17.0-14 (Latest hwe kernel upgrade 6.17.0-14-generic conflicts with virtualbox 7.0.16 under 24.04 - Support and Help - Ubuntu Community Hub). Unless Ubuntu fixes it, workarounds seem to be to use an older kernel or to use the version of virtualbox that is provided directly by Oracle.