Waves I’m just starting out, but I only do 10-15 lessons a day. Not because I can’t “learn” (aka. Remember for 3 minutes to pass the quiz) more than that a day. But because I have limited time (and energy) to keep up with the review material I know will accumulate as I progress.
When I first read the guide and some of the other materials on the forum I worried I’d get stuck with days that I didn’t have anything unlocked to study. But I feel like taking my time and having vocab lessons to re-enforce the Kanji I learn is really helping my retention. You’ve already got a head start so just take a breath and pace yourself. I figure I’ll reach level 60 in about 2 years and 4 months ((8500 lessons/10 lessons per day)/365 days) and that time line sounds just fine to me. Bet you’ll beat me to 60. But I’ll make it too.