A series of daring escapades implies to me that we may see Han pulling off more than one job in the film, perhaps with escalating stakes as he takes on bigger heists.
Han Solo was famous as a smuggler long before he became a hero of the Rebellion.
Fortunately, this synopsis is spoiler free, but that doesn’t mean that it is completely devoid of insights.
If this is his origin, it would be logical that he would start small before becoming the notorious rogue we know and love.