When I did mine, I rented one of the "carpet doctor" machines from Focus.

It was certainly very easy, just like mowing the lawn. And I believe it had
a hose with attachments for awkward corners.

Also, i'd try and get them done early in the morning on a nice day and make
sure you can leave the windows open to get the carpet properly dry,
otherwise you'll have a damp smell for some time.

Unless you plan on doing a lot, I'd just rent one.

HTH
J