I tried it on my end and didn't go through any issues. When you type-in your city, please select the city from the drop-down list that will pop below the text field. You can also try clearing your cache, and cookies first, or using a different browser, to see if the issue persists.
Your profile was accepted, feel free to start submitting proposals for jobs that you find to suit your skills and experience. Also, please check out these threads Getting Started on Upwork and Hiring Headquarters. There you’ll find some excellent articles and learn more about Upwork.
I can confirm that your account registration has been accepted. Welcome to Upwork!
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I hope this helps!