Complex sentence: When Armando was 6 years old he lost his arm in a car accident and despite the difficulties, he returned to swimming as therapy, and was in that moment when swimming turned into a passion and a hobby that entertained him and he really liked.
Split into simpler sentences: When Armando was 6 years old he lost his arm in a car accident and despite the difficulties, he returned to swimming as therapy. In that time was when swimming turned into a passion and a hobby that entertained him and he really liked.