Hashem simply means, the name.  Some use the expression because they feel His name is too holy to say.  Others believe that if you do not use the name, Yahweh, your eternal security is at risk.  The ancient manuscripts do not reference the name, Yahweh, but rather YHVH.

Is the exact usage of the name important or can you refer to our Elohim as G-d, Yahweh, or whatever is appropriate within your language?

The scriptures do not reference a music ministry. Yes, David may have paid musicians to play in the temple, but that does not constitute a ministry, but rather a job or an office. An office is not the same thing as a ministry, else there would be a ministry of secretary and usher and…you get the idea.

Ephesians 4:11-13
4:11 And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
4:12 For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ:
4:13 Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:

Are you pleased with the way Pat Robertson and Jerry Falwell speak for the Christian faith? (don’t make me give you examples)

If not, and you have kept silent, you might be held accountable.

If you see your brother sinning and you don’t say something about it, are you responsible?

Is a sin out of ignorance the same as one out of stupidity and if not, why not?

I know the answer, but from what I hear, see and read, some people don’t.

Do you want something from the Lord?

Can you think of one good reason why He should give it to you? And don’t say grace! You always say grace at a time like this.

How can you have any pudding if you don’t eat your meat?
- Pink Floyd