Tips on consistency?

Hey r/lsat. I just starting prepping for lsat a couple weeks back and I've taken 2 practice tests so far. On my first one, i got a 159 diagnostic score with most questions wrong in LR. Only like 5 were wrong in RC and LG combined.

This one today was a 163 and had a perfect RC, but now about 1/3 wrong in LR and 1/2 wrong in LG. Does consistentcy with the logic games and reasoning come with time and practice? Is there any ways to speed up improvement? I'm using Khan Academy right now. Thanks!