I think everyone else already told you this, but never tell your employer anything about your medical history or health unless you need an accomodation or time off. There is literally no benefit to doing this. Especially when it’s something highly stigmatized, like NPD.
If they ask during a job interview, you need to be ready to lie.
People ask you your medical history during job interview? Where do you live?
(Also did you get the job?)
I think most people absorb a puritan idea of “removed” from society. Even like liberals, queer people, and sex nerds (people into kink) will have a version of this. For the right, it’s usually a very misogynistic idea about how female sexuality and anything gay is evil. And this is usually what makes conservatives want to quit porn, though sometimes they won’t admit it and they’ll talk about like their essence or whatever.
So like you don’t need to quite porn for the right reasons, you can just do it. But maybe spend some time thinking why you want to do it, and if it’s because of some idea of removed or shame then you should also think about it you really want to hold those ideas, because they will ultimately make you just as miserable as the porn did.
If you want to get better at Linux terminal and standard unix commands I would try https://overthewire.org/wargames/bandit/
It’s an interactive tutorial which will help build basic skills. There are a million guides and walkthroughs for this, but I would try each level on your own first before you look at a guide.