Newbies? Do you mean people who have never been to SXM before or ??? for some reason I'm thinking new babies? Maybe because you mentioned Le Galeon which is also known as Baby Beach.

All beaches are great. Anse Marcel is wonderful but expensive to eat and rent chairs best to rsvp there. Baie Rouge is nice but not sure if there's a chair rental place there. You could always rent chairs & umbrella from Pack Lite and carry to your beach of choice.

Mullet has food and chairs but at times has undertow. Grand Case has a long curved beach. At the far end just after Grand Case Beach Club is Petite Plague. You can rent chairs from the beach club and get food from their waterfront restaurant. Eat overlooking water and island of Anguilla or eat at your lounge chairs.

Orient Bay has lots of places along their long beach to rent and eat. We like La Playa at the far end.