The idea is good, but the opening sentence is awkward, especially “Starting with regarding”. I’d rewrite it more naturally:
The British royal family is known for its long-standing traditions and strict rules, covering everything from the clothes its members are expected to wear to how they should behave in public.
Rules for Royal Children: 9 Fun Facts
Royal children are also expected to follow many of these traditions from a young age. In our gallery, we take a look at nine rules that may seem surprisingly strict—or even bizarre—to most of us.