Every state government has own exams government jobs e.g. MPSC for Maharashtra and GPSC for Gujarat. There are various post you might be eligible e.g. Clerk , Typist etc. Please go through sites of respective state to understand various post and eligibility.
Secondly, you need do some courses e.g. Govt. approved computer courses , typing courses, Industrial training (I.T.I.) courses. These will help you to get individual government running companies like state electricity board, BSNL etc. which recruits directly through advertisement. Also pursue your education, there is no age limit for education. Complete your graduation at least because most of jobs required graduates.
For your writing skills , improve vocabulary , try not to use dictionary in writing this will improve spelling knowledge, improve communication skills through talking and online forum responses. At last you have to be imaginative to writing because writing is all about what you think.
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