New Audio System 2003 Altima SL

[Danmasta]

So I want to install new speakers in my Nissan Altima, the stock Bose system just isn't doing it for me.. it sounds too plain and dull. I've been looking at some JL Audio ZR650CSI speakers for the front, and the VR690CSI 6x9s for the rear.. and I want to install them myself. The only problem is I don't know where to start. I can install a speaker just fine. but I need a tutorial or a book or something to help get me started, like how to properly take apart the door and replace the crappy amp. how to properly take out the 6x9's above the rear headrests, how to take out the component tweeters and woofers in the front. If someone could point me in the right direction I would really appreciate it

I want to know how to take apart my car without damaging it. im too scared to take out the center console and/or doors because im worried i might break them. so what i really need is a guide on how to take the pieces of my car off so i can reach the speakers/ amp/ and head unit.

I've only had this Altima for 3 months.