De-clicker

Here's the link to download the de-clicker and the de-esser effects for use with Audacity.

https://forum.audacityteam.org/t/updated-de-clicker-and-new-de-esser-for-speech/34283

Once downloaded, store in your Audacity Plug-Ins Folder, then activate by going Effect/Add-Remove Plug-ins/Enable, then you will see it towards the bottom of your Effect menu. Try the default factory settings first, then toggle the sensitivity threshold up or down 1 or 2 db until it gently removes the click. Apply to individual clicks, especially within words which are hard to remove otherwise. Applying to the whole file works well, but takes time to run.

Use the de-Esser tool as above to remove those sqelchy S's in your file. Test individual s's first, then use gently.