Just popping in to drop you all this link. Read it and replace "art" with "costumes" or "props" or "poses" or "being in character," because it applies to ALL of those. So you're new? Doesn't mean you should quit! No one who does this kind of stuff instantly gets it and does it spectacularly. No one. Everyone starts not knowing how to do anything and works up to doing amazing stuff. Don't believe me? Ask that epic cosplayer you meet about their first costume, or their first props. Ask them whether they've ever felt like they're not good enough. Ask them if they feel they've achieved perfection yet.
Just because you're not as good at something as someone else doesn't mean you should quit it. Seriously, honestly, you'll learn. You'll grow. You'll get better. Work at it. It doesn't come instantaneously.
This has been a public service announcement from Canny Puca Cosplay, a cosplayer who often feels inferior and like she's got nothing going for her but fights through it and keeps trying to improve and do better each time.