@Rockvole, the schematics look fine and the regulator should work.
I guess you don’t have an oscilloscope? Do you have a multimeter to measure the 5V on the Vin pin of the Core? With your multimeter on DC volts, it should read about 5V. With the multimeter in AC mode (yes, you read that correctly), you should see very little to no voltage. If you see a significant voltage that may be because the regulator is oscillating.