There's nothing wrong with starting your prep early as long as you keep it up. Try not to go more than a few days without at least doing some kind of LSAT work, even if it's not a long study session. You don't want to burnout by working too hard for too long and you want to be able to retain what you learn. Slow and steady. Go through the curriculum and retain everything you can. Your score is not important right now. Learning the material is. And good news, based on your diagnostic, I would say your score will probably shoot up a lot after going through the curriculum. LG is the easiest to learn, so it's actually nice for you that it's the category you struggled in the most. With some work, you'll get that LG score down pretty quickly and your score will jump along with it. Regardless, don't worry about your score right now. Work through the curriculum, take the time to blind review questions fully after each practice set and let your brain absorb the material. You'll be killing it on this test soon enough.

Confidence is very hard to keep up. Every time something goes wrong in practice, I feel like I'm going to fail on the real thing. I think reviewing fundamentals is helpful for confidence. When I go through a section that I have down, just for review, it feels good knowing how quickly and accurately I can get through it. But confidence has been a huge issue throughout prep for me as well.

Awesome that you're scoring so highly. It sounds like you're well prepared already. If you have a list of questions that are particularly challenging, I would go through them a few times and really try to internalize them. If you have a question type that is a little weaker, foolproof it. Otherwise, practice tests, BR and don't psyche yourself out. If you're at a 175 already, there's no reason to think you won't perform exceptionally on the real thing. Like lsatplaylist said, keep that endurance up and see how close you can get to a 180. Keep your skills sharp across the board and you'll do great.

I would also like to join. I'm planning on taking the July LSAT and am scoring mid 160s consistently. I am about 20% into the 7Sage curriculum but I already worked through The LSAT Trainer. I am trying to score mid 170s if possible. Let's get a good group together.