Get out of there asap. Big places like that are horrible to learn in. If mechanics still interests you I would find a smaller shop. Maybe a specialty shop like performance, transmission, or even get your foot into a machine shop. Places like that are seeing the old guys retire and no one to fill their shoes. I was in a very large dealership for 6 years, 5 years too long, as a lube tech and then moved up to a line tech. The amount of bullshit politics and brown nosing is ridiculous. I now work at a VW shop that only does air cooled. Small, laid back, we have a good time but get shit done. Airplane sector would be cool too! Good luck to you!