This is full of error. No, if you praise God continually he won't bless you continually or give you what you want.

No, the tabernacle of David wasn't praise. Here's what one of the Bible commentaries says:

http://biblehub.com/commentaries/amos/9-11.htm

Amos 9:11. In that day — In this and the following verses, to the end of the chapter, we have a most consolatory conclusion of this prophecy in sundry evangelical promises, after so many very severe and sharp menaces. The phrase, in that day, signifies here the same as afterward, or, after this, for so St. James interprets it when quoting this very verse, Acts 15:16. And there are other places of Scripture where then, or in that day, signifies afterward. Will I raise up the tabernacle of David — This promise seems, at least in the first place, to be intended of the return of the Jews from the land of their captivity, their resettlement in Judea, rebuilding Jerusalem, and attaining to that height of power and glory which they enjoyed in the days of the Maccabees. This restoration was an event so extraordinary, and the hope of it so necessary to be maintained in the minds of the Jewish people, in order to their support under the calamity of their seventy years’ captivity, that God was pleased to foretel it by the mouth of all his prophets.