Remove deleted Apple ID?

I have had a problem for several months… I deleted my Apple ID without logging out first… Now the ID has been deleted, but is still logged in on my IPhone SE. I can't reset my iPhone without an ID, I know that. So I reached out to Apple Support. He sent me a link on how to get into DFU mode and connect to my laptop.

Now my question:

How can I access my cell phone on my computer? Do you have to do this in the settings?

I was told I can erase my iPhone through iTunes on the computer. But how does one do it? I do not understand the instructions from the Internet at all…

I feel really stupid because of that, it hits me pretty badly… Is my cell phone really for the bin now?

I thank you in advance… 🙈

You will need to reset your iPhone by connecting it to your computer or Mac. In iTunes you then have to click on your iPhone and click on "Restore iPhone" in the overview.

Best wishes
rising Eagle