As mentioned,
Quicken Spell at 3rd level is meaningless. It's a +4 spell level modifier which means that normally you'll have to have 4th level spell slots to cast a quickened 0 level spell. If you're already stuck with that build then ask if you can swap it because of it being an oversight.
If you read that Quicken was a good feat choice at 3rd then keep in mind the
only way it's going to be useful at that level is if you have Divine Metamagic for it. Considering you haven't said non-core feats are available then, again, it's not going to help you.
If you're pretty well limited to PHB then I don't recommend taking anything from Tome of Battle because it's very, very likely going to cause problems with your DM or other players.
Core melee won't work so well since you won't have quite the resources (mostly spells and feats, especially stuff like Persistent Spell and Divine Metamagic used for a 24 hour Divine Power) that make clerics better in combat.
You'll want to PrC out of cleric as soon as possible (within reason) since it doesn't have any class features gained past 1st level. I believe Church Inquisitor is the earliest PrC available since it has very low requirements, but that might not work for you since the fluff behind it is you're dedicated to weeding out corruption within your religion. Plus you have to be Lawful Good or Lawful Neutral and a member of a Lawful Good church so there's no way you're going to be using
Animate Dead because it's an Evil spell.
By the way, there's a bit of an annoying line in the cleric description that says you can't be true neutral unless your deity is also true neutral. If you're going to be TN then you'll want to make sure there is a deity that works there, or that your DM is okay ignoring that rule.
Ordained Champion might work for you if you want to go more into melee, but it does lose caster levels at 1st and 4th. The War Caster ability gained at 5th that adds +2 to your CL for War domain spells thus makes you only as good as a full cleric at casting them unless you have the feat
Practiced Spellcaster. You'd need to redo the fluff a bit if you don't have Hextor or Heironeous in your game's pantheon, but if you can refluff it such that you can be Lawful Neutral and worship a neutral or evil deity then you could still pull the Animate Dead stuff. Most people only go 3 levels into the class for the Channel Spell ability.
If you still value your spontaneous healing you might not want to go into Ordained Champion because it gets rid of spontaneous cure/inflict spells and trades them for spontaneously casting War domain spells instead. The feat
Spontaneous Healer can bring that ability back in a limited way, but since it's a non-core feat you might not have access to it.
In terms of pure casting the Contemplative is a viable option once you're past 10th level. The fluff requirements can typically be met through using a Commune spell. However, it might not be advisable to go in it past 6th level since at 7th you get Spell Resistance (which will screw up anyone else trying to buff you, but won't screw up your own buff spells) and then at 10th you become an Outsider which means you're not subject to certain spells that might help you such as Enlarge Person.
Unless you know you'll be facing many foes during most encounters instead of a single big one, drop Cleave. You've got better ways (spells) to take out multiple targets, especially if they're able to stick around for a bit and hamper a bigger bad in the encounter.
How does your DM do experience, by the way? The DMG has a table that shows various experience levels and notes on page 37 that lower level characters in a party actually get more experience (because the encounter was a tougher challenge for them) than higher-level characters in the party If your DM runs things that way then looking into Crafting feats might be a wise idea because you're somewhat compensated for cutting into your XP. If the DM simply hands out the same XP reward to everyone then crafting might not be as nice, but it'll still be useful since you're probably not likely to get all the magical doodads you or your party want or need.
