St Martin Recommendations

We are traveling to Saint Martin next week with our family of four (two teenage daughters) We are staying in Oyster Bay and looking for recommendations for pretty much anything and everything. Primarily, we are looking to venture out for snorkeling for the first time for most of us. That said we aren’t a crazy adventuresome family and some of us get motion sick. Can anyone recommend a half-day snorkeling trip for us? One of my daughters is not a super strong swimmer. We also welcome recommendations for hikes, beaches, and places to eat. We have done a fair amount of research ourselves, but just putting this out there case anyone has strong opinions. Thank you for taking the time!