For a beginner, it is best to dive with an instructor on specially equipped areas.
For the first dive, it is advisable to choose a shallow pool in which you can practice using diving equipment. After that, the ideal option would be special bases, which have their own section of the sea.
Usually there are specially placed various objects for research, such as such as sunken ships, from which hazardous objects dangerous objectsrocks, special varieties of algae are planted, and sea creatures are introduced.
But remember, until you are experienced enough to dive on your own, use the services of an instructor.