QUOTE(chinti @ Mar 5 2014, 11:03 AM)
ordered
say hi to everyone here first

im an iphone user since iphone 3G era and finally decided to jump ship to android, sold my 4S yesterday.

will need a lot of help when my nexus arrive n when i wanna root it n so on, hv totally zero knowledge about android.

Since you're from iOS, you need to familiar yourself with Android ecosystem
Make sure before attempting anything (root, flash),
ALWAYS READ INSTRUCTIONS provided by the OP.
If you planning to root, I suggest you unlock it right after you get it since unlocking will wipe your phone.
So now since you got time (before your phone arrives), go do some reading on what are rooting, flashing, roms, kernels, etc,etc. First page got some links for reading too

or head on to
Nexus 5 @ forum.xda-developers and do some reading.
Happy learning. And have fun