Example sentence:
Die Wegbeschreibung, die ich mir der Einladung zum Vorstellungsgespräch bekommen habe, ist sehr gut.
The der Einladung seems to be of Dative case, but I failed to understand this grammar structure here. Would it be better to just use für, i.e.
..., die ich mir für die Einladung zum...? (like in English)
Another minor point, as I feel, Dative Case can be translated as "to you; at you; for you; in you"; that said, the 3rd object in a sentence. For example, Ich schickte dem Mann(e) das Buch. But this point seems less relevant because the subject is already "ich". Does the meaning change if I don't use "mir" in this sentence?