under your wing

under (someone's) wing

Protected, tutored, nurtured, or cared for by someone. I was nervous starting an internship at my uncle's company, but it definitely made it easier being under his wing. Our parents died when we were quite young, so my sister and I were under our grandmother's wing for most of our lives.
See also: wing

under your wing

in or into your protective care.
1991 Mickey Mantle My Favorite Summer He kind of took me under his wing and showed me the ropes in my first year.
See also: wing