Cosplay mention hey hey (My brother happened to have asked me this same question a couple weeks ago haha)
For me I'd improve upon my Dokja cosplay (As it's my first, I'm a complete beginner) and/or cosplay Vash the Stampede (Trigun Stampede specifically) or Ayatsuji Yukito (Bungou Stray Dogs Gaiden) as those are kind of high up on my cosplay priority list at the moment, but I haven't started yet due to complexity
There are others on my list, but the rest would be easier as they're kind of popular characters and/or their outfits are pretty simple (Cough, Gojo Satoru, Yuta Okkotsu, Hitori Gotoh, + more characters I want to casual cosplay, cough)