I’ve been told to start commenting on this site, so here are a couple of thoughts:

-Regarding the use of “get home”, “get there” etc.
I don’t think these can be compared with “obtaining” something. The difference between “get home” and “get to work” is, as I understand it, a technical one. The use of “to” creates an adverbial phrase out of the noun work. “Home” in the case of “get home” (as opposed to “my home”) is an adverb, not a noun. Accordingly the preposition is not required. The word home should be understood as “to my/your… house”. “Get there” should be read as “get to that place”; “get here”, “get to this place”, and so on.

-An interesting difference between “get” and “arrive” is that the first seems to focus on movement. It makes sense then that it takes the preposition “to”, a preposition of movement, while arrive takes either “in” or “at” which imply location.
This is particularly interesting in the following question: “How did you get to Seville?”
Here we aren’t interested in the way we arrived but in the form of travel. I find this construction sometimes confuses students who translate “get” as “llegar”. I imagine that in Spanish you’d use either “ir” or “viajar”. i.e “¿Como fuiste/viajaste a Sevilla?”

There you go… Slightly technical pedantic details. But maybe somebody will find them interesting… Probably not.

“the work planned is finished” ó “the job planned is finished”

Me aconsejaron escribir work, y asi lo hice, pero no me quedé convencido ya que una traducción para “job” sería “tarea” que pienso procedería de forma más óptima en este caso.

Could you tell me an explanation, please?

Thanks in advance

Greetings, Emilio.