In The Great Gatsby, what was Nick's intention (or goal) in moving East?

If you read the first chapter, Nick himself tells us why
he decided to move East and what in particular his goal or intention was. Having
returned to the United States after participating in the Second World War, he finds that
he returned "restless" with a widened perspective of life that had changed him and the
way that he regarded the world. Note what Nick tells us about how his feelings about his
home in the Middle West had changed:

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Instead of being the warm center of the world,
the Middle West now seemed like the ragged edge of the universe--so I decided to go East
and learn the bond business. Everybody I knew was in the bond business, so I supposed it
could support one more single
man.

What is interesting is
the way that Nick's war-time experience opened up the world to him, and led him to seek
life in the thriving East of the America, but at the same time his choice of career and
his intention seems curiously vague and unspecified. Note the use of the verb
"supposed": it is clear that Nick is joining the bond business not because he feels
passionate about it but simply because he needs something to do and he might as well do
what everybody else was doing. This vague listlessness is interesting to remember as we
continue to build up a picture of Nick in the novel.