Re-install Debian on Rev C

So I’ve done some weird stuff on my BBB rev C.
I’m now unable to access in my browser though I can still connect via usb.
I’m also not able able to access the internet through my USB any more.

I figured the best thing to do is reinstall debian so it’s just like right before I bought it.
If I flash it with the eMMC image found here:
will it restore it to just like how it was when I bought it?

Using the eMMC flasher image should put it back to how it was in the box. It does take a while to flash it…