OK, seems like I’m not helping at this point…
Just wanted to check one thing about your reply for my own sanity. I’m not exactly sure what you are referring to when you say ‘pin36’ and ‘GPIO pins’
Here is a useful diagram that I use as reference.
Seems like connector pin 35 would be the pin to test that your LED is working with 1.8v. and the GPIO 36 for testing the commands.