You will need to add your city to your address before you can submit your application for a review. Once you're ready please click on the Review Application button at the bottom of the page.
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I checked your account and can see that you are yet to submit it for review. You are also yet to fill in your City field in the address section of your account application. When you click on Review Application, all the things highlighted in red needs to be reviewed. Once you have updated your profile accordingly, you can submit it for the team’s review. Please know that profile reviews may take from 24-48 hours.
The strange thing is that i did fill it and didn't have any errors on my first try but i could not continue.
For some reason now i can do it normally.
It looks like your account registration has already been approved. I would recommend that you read up on these freelancer resources and these tips for avoiding questionable jobs, for help getting started, and for more information about working safely through Upwork.
I hope these help, and welcome to Upwork, Mert!