I'm new to car, so please tell me if this wouldn't work.
But I want to get some Lowering Springs and drop my car a little bit and camber the back with arms.

Can I do this will it be logical and what's the best pieces to be using?

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I've run a few springs on this car, and my favorite are the Tein S-Techs. I've since upgraded to their Flex Z coilovers, but if you're looking for springs only, they're fantastic. TRD's are too stiff (and not enough drop) and my Sportlines never fit right up front.

For rear arms, I've been on the SPC version for a few years, no real issues but the one end of them needs to be unbolted from the car and spun around to adjust. I'm not sure if there are any that are adjustable without disassembly but when I purchased mine there weren't. It looks like TB Performance used to make some arms for this that fit the bill but not anymore. If you grab the SPC's (I think Megan is the same way) make sure they back the car off the alignment rack and drive it around a bit to let everything settle before they lock everything down or they'll end up setting it to where the toe will be off.