thanks gmat club and other expert members

finally done with it, with a sigh of relief ,now I have to work on for the next daunting task. With the failure in the first attempt (660 Q49 V28), I was devasted and didn't know how to improve. I started from the GMAT club and came across GMATNinja (Charles Bibilos), went through all his videos, his explanation for sentence correction and CR is way better than others because he doesn't rely on complex grammatical rules for eliminating wrong sentences rather uses simple logic. the process is slow and needs hard work before improvement starts showing up. I also signed up for Magoosh course, their course is quite simple and amazing, no needless approaches and concepts. They are right to the point with their short videos on nicely divided topics, especially for SCs, their explanations are simple and comprehensible and lastly, its value for money.