Read his writings in a leisurely way, perhaps more than once to absorb what is missed the first time.
Follow up with those of St Teresa of Avila, and Edith Stein (St Teresa Benedicta of the Cross). Or in any order as you find them.
You will likely have come across, within the above readings, the poem The Dark Night of the Soul as well as the Saint’s interpretation.
Read the poem alternately with Solomon’s Song of Songs from the OT.
In light if the Saint’s interpretation of The Dark Night of the Soul, listen to Loreena McKennitt’s musical version.
Be in no hurry whatsoever, savour all. My exploration took a year, maybe more.