Just to confirm, you are using this product:
https://www.adafruit.com/product/789 with the Metro / Uno shield form factor but connecting it instead to Raspberry Pi Zero?
Sorry about the confusion with the SEL0 and SEL1 jumpers. I was only familiar with the breakout, not the shield so I didn't realize those were different.
It looks like the silkscreen on the device says how to switch to SPI:

So you'll need to close those two jumpers. Close meaning connect the circuit, the two pads under SEL1 need to be connected together, and the two pads under SEL0 need to be connected together. But none of the SEL1 pads should be connected to any of the SEL0 pads. The should each only be connecting to their own partner pad.
It should look something like this:

It's probably easiest to use a few pieces of wire or resistor leg and solder it into place between each of the sets of two pads.
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In the learn guide they use pin D5 I would think this means GPIO pin 5 on the RasPi which looks to be pin #29 from the diagram here:
https://raspberrypi.stackexchange.com/a/94303/2990