The most basic course to learn freediving is with the AIDA 1 Star course, it is really a taster or for anyone with no previous freediving training, offered as a required minimum freediving entry level in conjunction with a spearfishing or mermaiding course. It is possible (and in many cases recommended) to go straight to the AIDA 2 Star qualification which industry wide is recognised as the first qualification you can dive independantly of a dive professional.
AIDA 1 Star Course is a theory and pool/shallow open water based qualification, ideal for beginners who are interested in learning the sport of Freediving especially for Scuba divers, open water swimmers, spearos, triathletes and snorkellers.