These two lines mean the same thing. Elihu is emphasizing that God has made him and so gives authority to what he is saying. (See: [[rc://en/ta/man/translate/figs-parallelism]])
This speaks of Job preparing what he will say as if he were setting up and organizing physical objects. AT: "prepare what you will say, and stand up and answer me" (See: [[rc://en/ta/man/translate/figs-metaphor]])