You had trained hard to come to the point you had come to, to become a demon slayer, and managed to make it to final selection, a top Mt. Fujikasane, after the seven days and under the wisteria flowers, to know you've made it... noticing four others making it to the end, which raises concern and had to select your ore... after being rewarded your messaging crow, of course

Tanjiro: He looked at the ores, before selecting one, rather based on keen instinct, or using a breathing technique...