https://www.reddit.com/r/shortcuts/comments/1cnnd2u/list_or_website_to_find_useful_shortcuts/
Best to try starting with searching this subreddit for whatever you find to be QOL.
To start, check out the post pinned post at the top of this subreddit —> https://www.reddit.com/r/shortcuts/comments/gzjgbr/list_of_helpful_links_for_shortcuts_information/
Or RoutineHub