its me again

After my desaster with lost emails I am about to install a backup solution.
I would like to go with rdiff-backup and rdiffweb for a somewhat "handy" interface.
However, when I installed rdiffweb via pip I could not get it to run.
A reason might be, it was installed in a "./local/..." directory which is not correct - I f am not mistaken.
However I am just a bit lost on how to install it to a correct location.
I am probably already wrong when starting python...
Any hint?
Thanks