I keep getting 9/11s on SAT reading practice

I started studying for the SAT for the first time around a month ago and feel like I'm not making any progress. My weakness is reading passages (all types but especially history). I spend 2-3 hours on Khan Academy reading practices alone every day and seem to be stuck at getting 9 questions right out of 11. A common trend I'm seeing is I continuously miss the types of questions where they have 2 parts to them (part 1 and a quote to back up the answer to part 1). For those questions, I am always stuck between 2 choices for part 1 and end up picking the wrong one, thus leading me to get part 2 wrong as well. At the beginning of my studying, my reading would vary from getting 4-5 wrong (out of 11) to getting 0 wrong on passages, but I haven't gotten a single 0 wrong on a passage in a while. I also always analyze my mistakes after making them and they always make sense after seeing the correct answer. I feel stuck and don't know what to do/how to improve. If anyone has any tips, please feel free to share them!