6
Via: io9.gizmodo.com
It’s quite untypical for a Jedi to start training at a mature age – they didn’t want to accept Anakin when he was nine due to this being too much. As a fully grown teenager, Luke has to train his way to become a Jedi as if on a self-taught course. That doesn’t last a day, certainly – there are 3 years between when Luke begins his training and is deemed ready. Lacking a true mentor, Luke has to solve many issues through trial and error. Reading the journals of Obi-Wan or frequenting Jedi Temples were some ways that Luke used to harness his powers.