There is a free de-click plugin for Audacity here … https://forum.audacityteam.org/t/updated-de-clicker-and-new-de-esser-for-speech/34283/1
but it’s only going to reduce mouse-clicks rather than remove them completely.
If the keyboard noises are louder than everything else, (e.g. recording via computer’s built in-mic),
try the pop-mute plugin … https://wiki.audacityteam.org/wiki/Nyquist_Effect_Plug-ins#Pop_Mute