For orchestra introduction to someone disliking orchestral work :
Beethoven 6 and 7 th symphony is impossible to dislike...( you can listen to the movie "Soylent green" as an intro for Beethoven sixth symphony "Pastorale" ) The 7 th of Beethoven is irresistible masterpiece about creativity and how to become creative as life itself (seeds) moving rocks (allegretto) .
Once you had heard them buy the 6 th of Bruckner by Karl Bohm among few other maestros choice the most beautiful symphony ever written...Takes off the light and listen...
( The 6th is the only symphony he never corrected and Bruckner was compulsive and obsessed by inferiority complex and corrected hundred times all his works. Curious for the greatest organist since Bach and the greatest symphonist with Beethoven)
I prefered choral music all my life over orchestral works by the way...
I entered into real orchestral obsession after my 6 months listening of Bruckner non stop ...
I am a bit excessive ...