Thank you kevinshorses for advocating letting them be a horse, "so it can be a horse" was my response when I got to the end of page 1. Then I saw that you had it handled on the next post, but beyond that, as far as going into the middle of the pasture and bringing that big bucket of grain, good luck, they don't even know what grain is, or carrots, or apples, they just know grass so good luck using food as bribery. This almost is better for your relationship though because you will go out there and she may not want your company at first, but once she does you know its because you earned her trust, not her stomach. Treats are wonderful, don't think my horse didn't figure out what they were eventually, but babies that age can really bust your chops. I can't tell you how many times I chased circles around the pasture just trying to be my horses new best friend, and when I say chased it doesn't mean she exerted herself, she was always just out of reach and trotting away ten steps to far. Eventually she would get tired and usually decide to lay down at some point and I would get my chance to finally snuggle and bond. Sometimes I would watch the pasture all day for her to take a nap so I could sneak in and hold her. That eventually won her over and I was able to catch her more regularly.
As far as leading goes, make sure you try to get some knowledgeable help with this, it is usually best done with one person holding the halter and another with a lead rope around their butt. You have to make sure to establish that she can't break away but other than that don't use the halter to pull her around. Instead have the friend with the butt rope encourage her to follow you when you walk so she learns to be lead not pulled. Young horses that age can throw some pretty big fits, and pull rearing jumping stunts during this process so whatever you do, don't let her get away during this, she is still small enough to think you are really strong and they never really wise up as they grow up and realise they can overpower you later.