Hello!
I am working to take a capacitance reading from two copper wires. Then, I want that reading to be taken into an analog (or digital?) port of the Arduino Uno R4 Wifi. Does anyone know of any ideas on how they would do that? Thanks 
You could use the capacitor as the basis of an oscillator. Then feed the output of that oscillator into a Schmitt trigger (most GPIO's on microcontrollers have one, so you may not even need a discrete one) and count the frequency. The frequency will be proportional with the capacitance. For the oscillator part, you may use something like the old and trusty 555.
What kind of capacitance do you expect? Two copper wires sounds like something in the 10s to 100s of pF's, right?
Yes exactly. It will be somewhere in the 10-1000 pF most likely. Thank you for you help!
When you say 555, what do you mean?
No, the frequency will be inversely proportional to the capacitance, or inversely proportional to the square root of the capacitance for an LC oscillator.
Yes, you're right; that's more accurate.
NE555 and its many variants. 555 timer IC - Wikipedia
See e.g. here for application hints: https://www.electronics-tutorials.ws/waveforms/555_oscillator.html
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