how can i prepare for iit jee if i am unable to get coaching &also i have neither a single guide available to me pls instruct me

You can apply for any correspondence course of any reputed institution for preparation of IIT JEE.

i would suggest you some books that i used for preparation and cracked atleast AIEEE, though lost IITJEE mains with just 4 marks in physics. for physics do HC Verma and SL Gupta, for chemistry - OP Agarwal and for maths - ML Khanna. while doing these, just try forming concepts and practice each and