【社会人になる】
➊stand on their own two feet 自立する - Strong people have to learn to stand on their own two feet.
➋Since college 大学を卒業してから - Since college, I've been weight training.
❸Get into the real world 実社会に入る - After graduation, you'll have to get into the real world.
☆一人前になる　full-fledged - He is a full-fledged member of our team.
☆大人　grown-up /adult - As a grown-up, you have a ton of responsibilities to do.