You’re going to need a few things to do this.

Yes, this can potentially brick your device if you use the wrong files, interrupt the process, etc. Once you hit start. Let it finish

• Patched Odin, to bypass SHA256 Errors
  https://www.droidviews.com/wp-content/uploads/2018/05/Odin3_v3.13.1_3B_PatcheD.zip
• Firmware for Device, can google it mostly. Few recommended sites below
  https://www.sammobile.com/firmwares/
  https://samfrew.com/
  https://updato.com/firmware-archive-select-model/
• Windows PC with the Google Drivers/Samsung Drivers
  Samsung: https://developer.samsung.com/mobile/android-usb-driver.html
  Google: https://developer.android.com/studio/run/oem-usb

Steps

1.) Install the drivers and download the Firmware for your device
2.) Open Odin and select the proper files (AP goes to AP, CSC goes to CSC etc.)
3.) Put the device in download mode via Vol. Down+Power and hit Vol. Up to continue
4.) Plug it in, hit Start on ODIN and you’re good to go.

Video coming soon.