If you are not planning to do anything to sanitize the spices, it is more than likely HERE that you would infect your beer.
adding them to the bottles.
It is very rare that you would find an experienced brewer who would do this, at this stage of the process. It is usually in the boil, in primary or in secondary that we add these sorts of things. Spices like you mention are traditionally added during the boil, to sanitize them as well as to let the heat of the boil release the flavor and aroma components.
And when we add things to the primary or secondary we usually take great pains to sanitize/steralize whatever we are adding, for example soaking oak chips in bourbon for a month to kill anything off, or to soak citris peel in vodka before adding it.
You will find that adding most things like spices directly to the bottle at bottling time are going to have little affect flavor wise in the beer, and more than likely would take away from the enjoyment to actually drinking the finished product, for example noone's really going to like spitting out a sliver of cinnamon, or a coriander seed when they are wanting to simply quaff their brew...and god forbid someone swallowed whatever it is that you think you want to add to the beer. That hint of coriander might be great in your wit, but it's going to be overwhelming if they bite down on it, it's no longer going to be subtle, and the drinker may find himself wanting to lick sandpaper to get the taste off of their tongue.
Save your experimenting of additives to where the rest of the brewing community adds them, in the boil, or in the primary/secondary, and leave it out of the bottle. It won't turn out like you hope it will, and you run the risk of doing more damage than good.
Besides, this won't be the first beer you brew, you don't have to do "everything" to it at once. Enjoy this first beer as is, and get to know more about brewing, learn what goes with what, and how, and develop your brewing skills/process, THEN you can start playing around, but from a basis of knowlege/understanding, and not from a place where you can drive a sliver of cinnamon bark down some poor soul's gullet.
Take a cue from commercial breweries...Have you ever seen a bottle of beer with cinnamon sticks or orange peels
actually in the bottle when you pour it out? If it were worth doing either Budweiser OR Dogfish Head would already have it.