are there training schools to learn this sport?
No, there are clubs that provide training for new pilots.
Gliding
Many clubs provide training for new pilots.
how long do gliders stay in the air They can stay airborne for several hours. what is gliding? It is a recreational activity and competitive air sport in which pilots fly unpowered aircraft known as gliders or sailplanes using naturally occurring currents of rising air in the atmosphere to remain airborne. who created the first glider? The Germans when? In  the 1920s and 1930s how do they fly? Through air that is ascending as fast or faster than the glider itself is descending, thus gaining potential energy. what's the fastest they can go? UNANSWERABLE so you mean they use lift to fly? Yes, ridge lift, wave lift etc. how are they launched? Different methods, namely aerotowing, winch launching, bungee launch etc. what's the maximum distance they have flown? Up to 1,000 km what do you do to land? The pilot will 'land out' - choose a location where he can land safely without damaging the glider, the pilot, or property such as crops or livestock. has anybody thought of using an engine on them? Yes, some gliders are fitted with small power units and are known as motor gliders. is this considered a sport? Yes, a competitive air sport are professional competitions held for this? Yes, world and European Aerobatic competitions are held regularly where are they held? UNANSWERABLE are they annual events? No, they are held every two years.
wiki:14186564
Gliding [SEP] Training and regulation
In addition to national laws controlling aviation, the sport in many countries is regulated through national gliding associations and then through local gliding clubs. Much of the regulation concerns safety and training. Many clubs provide training for new pilots. The student flies with an instructor in a two-seat glider fitted with dual controls. The instructor performs the first launches and landings, typically from the back seat, but otherwise the student manages the controls until the student is deemed to have the skill and the airmanship necessary to fly solo. Simulators are also beginning to be used in training, especially during poor weather.