The wanderer from Nanoxate

In a world where war and monsters are commonplace, various forms of combat are developed and taught to the common citizen. Javean is a 18 years old boy living in the City of magic, Nanoxate.
However, he has really weak magic power and he believes himself to be a better sword user.
One day, an unknown incident swallowed Nanoxate in flames and Javean had to escape.
Now without a home to call his own, how will this incompetent mage survive in the world?