If you have no backups then you cannot restore anything. However, if you had enabled iCloud syncing for things like contacts, calendars, notes, photos, etc then they will be restored when you log back in.
As your iPhone can easily be set to automatically back up to iCloud every day you might consider using this feature in the future. Just open Settings, tap on your name, then iCloud, then turn on Backup. When your phone is locked and connected to Wi-Fi and power it will back up daily. A good reason to charge your phone overnight, every night.