you have a cool user name so I'll help you. first, reorder the 2nd paragraph to start with what they will get out of the deal. I would put the sentence about the shows you produced first because it's the most impressive part. it's cool to write about what you like about the field, but save that for after.
"I have been exposed to some of the many..." delete "some of the"
"I have grown quite fond..." incorrect usage, say something like "This field is a perfect fit for me because it allows me to..."
"quality of our programing" programming is misspelled.
"Also, while at Citytv"... kind of a runon, "which has greatly improved..." can become its own sentence worded a bit differently.
instead of "I'm enclosing" it's nicer to say "Please find enclosed". Delete "a copy of", extraneous.
good luck!
<---user formerly known as Pipboy 😉