wannabe

noun2

1. •
   [before a noun] (informal) Someone who wishes to be someone or do something, but lacks the qualifications or talent; an overeager amateur; an aspirant.

   • Hollywood's restaurants are full of wannabe actors waiting to be discovered.
2. •
   (informal, disapproving) Someone who wishes to be part of, or to assimilate to, a majority group of which they are not a member.

   • Bigger, mongrelly and black, he was clearly a Doberman wannabe. — 2000