I've found patience, balance, and smart, self-aware study techniques to be the most important factors for growth. I'd be really wary of setting yourself some # of hours to study each week, especially when you find yourself struggling to hit that threshold. One of the most important things to acknowledge about this process is that it's far more about effective absorption and exposure than hitting some threshold for each week. If you're finding that 30 hours of studying for the LSAT is negatively affecting other areas of your life, then, well, just cut back. You're starting early enough to give yourself the time to take breaks or more relaxed periods when you need to, and you'll need those times to process the information you're picking up.

Also, with your LG idea, that's what I did, and I don't strongly recommend it. Jumping forward to LG isn't a bad idea, but you're going to find yourself constantly looking back to the early LR lessons to pick up the ideas that are crucial for getting even the basics of LG. At least get through the lessons on Lawgic (and the advanced stuff) before jumping ahead.

TL;DR: Emphasize studying in a way that works for you, and ask yourself if 30 hours/week is the best way for you to study right now (b/c it seems like it's not). On LG: I wouldn't skip ahead -- get a really good grasp on conditional logic first, which comes pretty early on in the LR lessons.