if you want mic input to RPi, better use a USB sound dongle with analog out and mic in ports. Those same ones that you can use on a windows pc (like the SoundBlaster X-Fi Go). Even those cheapo USB dongles work with the RPi
the program/app you want to use must be able to identify and access the mic port on the USB sound dongle.
me have of those dongles, use only for sound output, I have no use for the mic input (nor will ever try it).
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"
Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"