Flashing will erase all your data (photos, contacts, apps). Since your phone is already stuck, you likely can't back up. Proceed only if you accept this.
Here are the most common reasons why your Vivo Y53 is bootlooping: vivo y53 flash file hang on logo
If you see the "Welcome" setup screen, congratulations! The issue is solved. Flashing will erase all your data (photos, contacts, apps)