Profile window
Profile opens from the account menu in the top-right corner (click your name or avatar) and edits the personal information tied to your account: first and last name, country, gender, a short bio, and an avatar photo. Email is shown but read-only, since it comes from your sign-in provider. Changes are written when you press Save; closing the dialog without saving discards them.
Editing your details
Open the account menu at the top-right and choose Profile. Fill in First name, Last name, Country, Gender and Bio as you like — none are required — and press Save to write them. Email stays read-only since it identifies your sign-in.
Uploading a photo, localized country names
Upload photo picks an image from your device — up to 2 MB — and replaces the round avatar shown in the dialog and, once saved, in the account menu itself. Country and Gender are chosen from dropdown lists rather than typed, so the stored value stays consistent; the country name shown is translated automatically to match whichever of the app's four languages you're using.