If you like this sport, but you've never trained for it, we should warn you that it is pretty complicated.
For something like this, you need to be 100 percent ready, because some of you may think they are, and then when they experience deep waters, they feel like they will drown, and start panicking.
We should also add that even 15-year-old child can do this, but that child must be in good health, and before start any training, children should undergo medical checkups to find out if they do have necessary physical conditions.
There are few types of scuba divers. Those who are simply doing it, because they want to do a little research and explore the beauty of deep waters, and there are those who dive for other reasons, such as commercial, scientific or military reasons.
Not matter what's the reason for this, you need to remember that without certification you can't do anything.
If you become good enough, and you have an expert level, you will be able to turn this into a career.
You also must know that every scuba diver must be a good swimmer, the one who can drift on water and who can swim pretty long distances.
Every diver must take care of his safety, and he will do that by getting proper training, and of course if he is using scuba diving gears.
If you are a beginner, you can always rent the gear, but if you want to become a professional, you definitely must invest some money, and buy it.