Hey dear, i liked your keen interest in NEET by seeing so many questions. I want to tell you that consistency is the key to crack the exam. The early you start , the easier it gets at last. There are many you tube lectures and some paid courses on edicational website for  youe self study. If you willing to follow a particular routine of study for 2 years, you will definitely get a good rank and you will succeed on your further aim. There are other medical options like bams , bds , bhms ans nursing, but try hard to get mbbs at first.