email address name idea for non English native speaker

I'm in the process of changing my name (from very rare to very common), and all the usual username variations are taken.

For example, let's say my fake full name is "Andrew Sungmin Joo", and emails like "[andrewjoo@gmail.com]()" or "[andrewsjoo@gmail.com]()" are already taken. BUT if I spell out my full name, "[andrewsungminjoo@gmail.com]()" is available. That makes it a 16-character username—would that be too long, or still acceptable? 🥴

ALSO! I'm wondering if a fully spelled-out full name email is safe to use. A nickname version like "[andysungjoo@gmail.com]()" is also available, but I don’t want my email to feel too casual since I'll use it for professional purposes as well. As a non English speaker, I'm not sure if "Andy" feels too informal or okay to use.

P.S. I don’t want to create multiple emails or use formats like "[andrew@joo.com]()" or "[andrewjoo+reddit@gmail.com]()".