Girl seeking Man (for audio advice)

I am a newbie. My coding experience is limited.(LED cubes). I'm seeking advice on building a guitarists stomp box that separates the lowest frequency from the overall chord.

Here are my questions:
Will an Arduino Uno Have enough memory to accomplish this?
Which sound shield would you recommend
.
Will the signal from the guitar need to run thru a pre-Amp?
Is this going to be a coding nightmare?

If this Is even possible, my plans are to run the low-frequency output into a Digitech foot pedal to drop the signal one octave, then run It in a bass amp.