Start with the warhorses and a few less warhorsey pieces !..
Handel : Water Music/Royal Fireworks
Haydn : London Symphonies
Mozart : Symphonies 40 and 41
Eine Kleine Nachtmusik
Late Piano Concerti No.s 20 to 27
Magic flute (Bohm’s highlights disc is a good starter)
Beethoven : Symphonies 3, 5, 6, 7 and 9.
Piano Concertos 4 & 5
Piano sonatas Moonlight, Tempest, Walstein, Apassionata
Archduke Piano Trio
Mendelssohn : Violin Concerto
Schubert : Impromptus
Piano Sonata No. 21
Last 4 quartets
Chopin : Anything really (but I recommend his ballads and Scherzi)
Dvorak : Symphony No. 9
Tchaikovsky : Symphonies 4 to 6
Ballet music (Swan Lake, Nutcracker etc.)
Rachmaninov : Piano Concerto No. 2
Elgar : Cello Concerto
That’s just off the top of my head. Apologies if I have missed obvious other pieces.
Performers are not so important at the early stage of listening. Just get to know the pieces and then later, there are websites/forums that can lead you to the special performances.
Stuff by Schumann and Brahms and a lot of chamber music is a bit more challenging for the beginner so can wait till later ! So can early music and 20th century atonal !
Have a good listen and work out what floats your boat. You won’t like all types of classical I don’t think. That’s normal. Find you areas of interest. But never be frightened to experiment outside your comfort zone - you may adore Josquin Du Prez or Schoenberg !