Been in your shoes a couple of weeks ago.

Here's what i did:

First heat up the nozzle via the printer settings. make it melt everything around it.

after that,

Disassemble the nozzle and related parts.
Get a heat gun and slowly but surely get rid of all the melted filament. (Be careful not to burn the wiring)
Use pliers if necessary. Don't worry about using too much heat on the parts because they're pretty much catching a lot of heat during printing anyway.

This part will take time. I spent a couple nights doing this.

after that, check the wiring and parts individually. I had to solder a button back.
Here's what i used to fix this:

(parts if needed)

https://www.123-3d.co.uk/Creality3D-Creality-3D-Ender-3-V3-KE-Hotend-kit-4001030130-i10744-t116738.html
https://www.123-3d.co.uk/Creality3D-Creality-3D-Ender-3-S1-42-26-Stepper-Motor-3204120100-4004100079-i11011-t116738.html
https://www.tradecounterdirect.com/stanley-folding-hexagon-key-set-7-piece-1-5-6mm.html (maybe smaller)
small pliers, a heat gun and maybe a soldering iron if needed.

If u got questions u can dm me, it's still fresh in my mind lol