“Reach”, “attain” and “accomplish” presuppose attainment of certain objectives.
Reach connotes arriving at a goal through effort and progress.
Example: We’ll have to stop and camp here. It’s getting dark and we’ll never reach our destination today.
Attain may imply great effort and pride in reaching a level or goal.
He attained a high academic level.
(BTW, “attain” is commonly used in the US.)
Accomplish connotes successful completion.
He managed to accomplish all his goals.
The primary meaning of “get” is to attain or acquire. It’s a very commonly used word and is often used in phrasal verb combinations, such as “get across” – to make understandable or clear, to communicate one’s meaning. Example: Am I getting this across to you?
I would write your sentences this way. 我用地道的话。
Yesterday I talked to my father about some things that would help us to understand each other better, but it was hard. I couldn’t get my point across. (I couldn’t get him to understand what I was saying.)
The word “hard” is frequently used for “difficult” in everyday speech.
You could also say, “It was futile” or “My efforts were futile.”
Futile means having no useful result.