The characters, like everything, are still works in progress. None of them even have names yet, and the magic horse is the only one with an appearance yet.
I don't know what you find boring about the setting though. I specifically planned the surroundings to give as much potential for monsters, villains and threats to loom in as possible.
As for action, here's a short version of what I've thought of for a first episode:
The story begins as Dingbat (working title for the audience surrogate pony) arrives in the new town looking to write a book about her life there. She has bought an old house that has been abandoned for a while, since the locals believe it to be haunted. The pony who sold the house never mentioned that, but Dingbat is skeptical about such stories anyway.
Right away she gets to meet the mailpony, who's supposed to help her move her stuff to the house. She doesn't seem to be taking her job too seriously, but eventually Dingbat reluctantly agrees to leave her luggage and moving crates in her care as she heads out to check out her new house.
As she gets to her new house, all her stuff is already in the house, with the mailpony relaxing in a hammock, sipping a drink from a coconut. When she notices Dingbat, she lazily puts down her drink and asks her to sign the papers before zipping away. Dingbat inspects the house, sees what furniture it needs (at least a bed, bookcase, writing table and a chair), and notices some strange noises coming from the walls. She gives a thought to the ghost theory, but thinks that some kind of vermin is more likely and moves out to find a furniture shop.
Instead of getting to a shop she was looking for, she notices the rustic store of the carpenter pony, and decides to see what kind of furniture she has to offer. The carpenter asks Dingbat a lot of questions about stuff like favorite color, favorite book, what time she goes to sleep and gets up, until Dingbat starts to get weirded out by this. Eventually the carpenter says she knows wha to do, and as Dingbat casually mentions her suspicions about pests in her walls, the carpenter tells her that if she has any problems with animals, she should seek out the nature pony.
In short, she meets the main cast, each referencing her to a pony she should go see next. As she gets home in the evening, she finds that his house is now gorgerously personalized like pony houses tend to be, with the carpenter pony telling that she did her best with the information she had. The mailpony is there since she helped carry the stuff there, the nature pony arrives to check the alledged vermin infestation, the magic pony comes to check the possible magical influences, so generally all of the ponies are in the same room at the same time. That's when the ancient secret hidden inside the old house gets revealed, and the plot proper kicks off in the next episode.
I've since planned that the secret could be an old doomsday clock that's been ticking under the floorboards. It was designed by a crazy pony who believed that time worked in cycles, and that in every cycle there would be six ponies crucial to the survival of Equestria. No one understood his logic and explanations, so he built this giant clock to count down to when the six ponies would arrive, and to the disasters they'd have to prevent.
What I've thought of for the disaster would be the awakening of some kind of eldritch horror sleeping under the town. We'd still need to come up with how to stop the disaster though, since if the ponies just kept it asleep it would leave the ponies living on borrowed time which is not conductive for a lighthearted pony show.