I am not fully prepared for neet 2019,so..i am thinking of taking my 1st drop for neet 2020. Should i??

If you have faith in yourself then you should take the drop. I am also a dropper and improved about 130 marks from my last year but all you have to do is a serious 1 year hardwork because you have to complete 2 years syllabus in one year. So if you are confident and ready for all the hurdles ahead then go for it..... Best of luck