To actually enable cron jobs you need something to call `autorestic cron` on a timed schedule.
Note that the schedule has nothing to do with the `cron` attribute in each location.
My advise would be to trigger the command every 5min, but if you have a cronjob that runs only once a week, it's probably enough to schedule it once a day.
Then paste this at the bottom of the file and save it. Note that in this specific example the config file is located at one of the default locations (e.g. `~/.autorestic.yml`). If your config is somewhere else you'll need to specify it using the `-c` option.