the world is someone's oyster
US /ðə wɜːrld ɪz ˈsʌm.wʌnz ˈɔɪ.stər/
UK /ðə wɜːrld ɪz ˈsʌm.wʌnz ˈɔɪ.stər/
1.
a person has the ability and freedom to do exactly what they want and go anywhere they want
:
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After graduating from college, with her new degree, the world was her oyster.
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With his talent and ambition, the world is his oyster.