Thanks for the answer! From the other answers I got in this thread it seems it’ll be safe to turn off Secure Boot, so I guess I’ll do that and try to boot again.
I did select to wipe the whole drive and install. And I wish I could install it with Secure Boot enabled but it seems thr only solution is to disable it.
Very informative, thank you! I’m a total newbie when it comes to Linux so there’s a lot of things I don’t get. Are there any drawbacks to using LMDE with NVIDIA compared to using regular Mint? Will this also work on an integrated, less powerful graphics card?