I agree (also with the tone) 100% with Trux.
Go ahead and do whatever you want , but do not start advising newbies this very dangerous practice. If you did not realize it was dangerous. Ok. But if experienced people from this board tell you it is dangerous and come with examples of people dying from this practice, take there advise and at least stop telling other people to follow you example

Do some googeling yourselve and look at all the deaths and see how many of them happened in very shallow pools unattended solo training or solo spearfishing. They all probably thought like you that it all went very easy and safe for them and they never had a problem and coold stay longer at the bottem each time. You only need one problem to die.........