Sorry for dumbing it down but, I'm a dummy...
-Make it so your phone screen will rotate when you turn it sideways (swipe up on your screen and tap the red padlock with the circle around so it's white, not red.
-start a text to somebody(maybe yourself to be safe?)
-When the keyboard comes up, turn your phone sideways to open the expanded keyboard
-You should see the white microphone in the bottom right
-Tap on that and it will pop up a blue mic icon in your text box
-just "x" put the text and it should clear the red audio icon on the right of your text bar and replace it with the old grey mic icon.