How to wire a mega328p-AU

The SD schematic is confusing and doesn't show a HC4050 component as is in my schematics thats why I was still confused.

My ICSP header should still work, I just have the pins in a different order, which doesn't matter as long as they are connected to where they're suppose to go (GND -> GND, MOSI-> MOSI).

Here's the new LED wiring :
Screenshot 2021-10-29 at 15.45.11

copied from the Sparkfun link you posted.

-Harvey