Hi, I am also in the foothills and zone 7
Welcome. I am also in zone 7b but in the SC side of the mountains. Neither my husband or I are Korean, but my daughter is currently attached to a Hospital in Korea. When I started growing figs, I started out with what I thought was a BT and a Celeste. To make a long story short, it appears that my BT is a Brunswick/Magnolia. All of my figs produce every year with no drop and are growing inground in red clay that a brickmaker could love. I covered the plants the first couple of years and now I just pile up a thick layer of mulch and leaves around my trees in early winter and pull it back when the worst of the freezing and thaw cycles are past. I have added 3 new varieties to my mix this year and hope they will do as well. Happy to share whatever I have learned about protecting my figs in winter. I have only been growing for about 6 years but am having a lot of fun with them. Also growing pears, peaches, plums, apricots and assorted berries. Climate here is so much more amenable than it was in Maine or Upstate NY where I lived before.