〇〇 the baker who finally learned to stand on his own two feet after studying as an apprentice
この場合、次のように言えると思います。
ー〇〇 the baker who finally learned to stand on his own two feet after studying as an apprentice
「見習いからやっと一人前のパン職人になった〇〇」
ちょっと長くなりますが、the baker who learned to stand on his own two feet で「一人前のパン職人」を表現できます。
apprentice で「見習い」
ご参考まで!