Add ModeratelyUsefulBot as a mod with the Manage Wiki Pages and Manage Posts & Comments permissions

Change "YourSubreddit" in the following url to the name of your sub and open it https://www.reddit.com/r/YourSubreddit/wiki/moderatelyhelpfulbot and click on "Create Page"

In that page paste the code from the Code Block in the middle of [this page](https://www.reddit.com/r/ModeratelyHelpfulBot/wiki/index) (that starts with the --- line and ends with the title_exempt_keyword line.)

In the first line in the code that starts with ###### change "subredditname" to your subreddit name

By default it limits to 1 posts (max_count_per_interval) per 12 hours (min_post_interval_hrs), not counting posts that get removed by AutoMod (ignore_AutoModerator_removed) and ones that get removed by a mod (ignore_moderator_removed)

Save the page and click on the first link in the page (that says "click this link") and send the message to update ModeratelyUsefulBot (you need to do that whenever you update the code in that page)