Thanks for the introduction and honesty about your skill level…that’s helpful for me to know in what I can and can’t assume with your build.
The fist: Did you solder the jumpers as in the pictures in the manual?
When you hit the bypass button does the led even come on? How about the green tap led? Does that work?
Both foot switches should be connected to ground when they are pressed and open otherwise. You can test this by using your continuity tester on your multimeter (it’s the function that beeps when the meter leads are connected). With one lead of your meter touch the chassis (it should be at ground potential…put the lead tip through one of the screw holes to free up one hand) and with the other lead touch pin 3 of the micro controller (U1). Pin 3 should (only) be connected to ground when the bypass button is pressed (you should hear a beep when it is pressed). Pin 4 of the micro should only be connected to ground when the tap button is pressed. If they don’t beep when they are pressed or continually beep then check your wire soldering.
Test those things and let me know what you find.
-Brach