Alright, I might have someone that I can go trough this whole thing again to make sure i understood it, the english while I understand much might be an extra layer of difficulty for me here.
I compared this to a windows account that I saw on many PCs years ago, like do you want to log in as "Motiz" , as "admin" or "family"
That I barely rememember, but I filled in the blanks and thought you might not be sharing with the other account what I'm using here.
At this point it feels like the only thing still confusing me based on you telling me it sounds like I still haven't understood it correctly.
Maybe I actually need to see it to make sure I don't missunderstand it just by imaging the wrong thing or something like that.
I just didn't imaged that I do that sandbox thing, have a second account and just continue like normal.
Me saying I need to install everything again might be because I expected a fresh account. I...try to search for exampled now, maybe I just need to see it. Thank you for the help it does feel like you told me everything there is.