Please Help! Issues With Blockbench Custom Texture in MCreator

So basically I made a custom model for a sort of a sword in the stone and tried to export as a json file and as a png but it didn't work

So then I followed a video tutorial, and then I followed another, and neither worked... so then I started improvising and I was able to get the model in game but the texture is still glitched! Here is what it should look like:

And if the image works, here's what it looks like:

Although it's not shown by the screenshot, there was actually a bit of the texture on the underside of the hilt, but it looked very cursed and broken. I would really appreciate a step-by-step tutorial to importing a block texture to MCreator, if possible!!

Thoinks plenty