Welcome! The beauty of Eberron is that it's both unique as a setting but familiar at the same time. You'll get a basic grasp for it in no time. All you really need to know is there was a big war that made half the continent go boom, so what was left of the warring kingdoms stopped fighting openly (OPENLY) and now adventurers go... adventure. Oh, and there's dragonmarks and weird crystals and airships. Yay!
Halfling healer screams House Jorasco, the Dragonmarked Halfling House of Healing. Work for them, you got to make a living out of your vocation, and very powerful friends. You don't have to be dragonmarked yourself (but you could).
Second, Halflings from the Talenta Plains have some cool lore in that they ride dinosaurs. No, that is not a mistake. No, that is not silly. It is awesome. Go look up the pictures. Halflings riding dinosaurs. Being badass badasses instead of hairy-feeted layabouts. Amazing.
You want to be in the halfling healing mob whilst being a conan-wannabe halfling riding a dinosaur? Eberron has got you covered.
Deities are really meh in Eberron though. You could just worship the Sovereign Host and be part of the mainstream religion. The Silver Flame is more your rabid witch-hunting church. Did some really bad things in the past in the name of goodness. Always handy when you can point at someone you don't like and call them evil and have your rabid followers murderstabburn said nuisance. A little genocide and all that. They never said sorry. There are a few other religions. They get weirder.