Simplify the following text for a Grade 7 native English-speaking person.
Original: Once her Second City training began , she immersed herself in the `` cult of improvisation '' , becoming , as she described it later , `` like one of those athletes trying to get into the Olympics .
Simplified: Once her Second City training began , she became highly involved in the `` cult of improvisation '' . She became , as she called it later , `` like one of those athletes trying to get into the Olympics .