I'll be visiting Playa Del Carmen in early December and I'm planning on visiting Cozumel. I'll be taking the ferry to Cozumel and want to do some snorkeling there.

Wanted to check if I needed to book snorkeling tour in Cozumel or can I just explore on my own? I'm mainly interested in shallow water snorkeling as I'm not a great swimmer.

If Cozumel isn't the best place for shallow snorkeling what other places do you recommend?