Originally Posted by kikinfl2004
I want know how can I install rom on my device for first time
First, you try to root your phone and install a custom recovery (CWM or TWRP). They have their threads somewhere in this forum. Just try to search.
You may also want to visit different threads for both the 4.3 and 4.4 Roms. Try to examine their features and decide which is most suited for you
As for the instructions, each of those threads have their own installation instructions so you wont have a hard time.
Good luck, and i hope i helped you.