I wouldn't try to work on my triggers, not because I don't know what I'm doing, but because in the event that I mess something up and don't realize it, someone could get hurt.
That being said, I have changed all of my factory AR triggers out with either HiperFire 24C or Geissele SD3G triggers. These have pretty much spoiled me when it comes to trigger jobs.
You can get a quality trigger for less than $100. I believe that Geissele has a budget trigger under a subsidiary company that retails for $45 and it is a quality trigger. Sure, it isn't as good as their SD3G or the SSA, but it is a lot better than a milspec trigger.
My .02 is if you can afford a good trigger than buy one, but don't try to alter your factory one.
Best of LUCK and let us know what you end up doing.