Problem #1: Excessive sibilance, curable with de-esser, e.g. desibilator plugin … Updated De-Clicker and new De-esser for speech - #199 by Trebor
[ After De-essing you can boost treble a little ].
Problem #2: Some room reverb. The free version of Couture plugin can help reduce it somewhat.
Problem #3: Needs de-clicking … Updated De-Clicker and new De-esser for speech