3.3V from 5.0v outlet
According to the datasheet the LM317 has a minimum Vin to Vout of 3v so you'd only be able to get 2v out of it if you put 5v in.  I'd recommend using either an AMS1117 3.3 or one of the cheap modules based on that chip that has an LED and capacitors on board. They definitely deliver 3.3v from 5v in.