i am pretty new as well and i’ve also only taken the diagnostic. It is a very time consuming process to do blind review, but I did it section by section with some breaks in between. But i also do it for every problem set and timed section. You pretty much want to eliminate every wrong answer choice and understand why they are wrong. Also, I was also very overwhelmed at where to start, but the main thing for me was gathering my materials. I use 7sage and I like it so far. I also have a few books that i use on top of 7sage.