I don’t really have any general advices for how to pace your lessons and reviews, but here’s how I do mine (or at least plan to do after I get into the rythm)
I decided to build myself a schedule that is as efficient as possible. I wake up at 6:00 A.M. every day and go to bed at around 10:00 P.M., this means I can do my first reviews at around 7:00 A.M. (I don’t wake up and instantly go to my laptop) and my last ones at 10:00 P.M.
Based on this, this is how I plan to proceed:
If I unlock a new level, I will try to do the Radical lessons instantly in the time span of 6:00 to 7:00 P.M., so that I can do my first reviews at 10:00 P.M., and after 7:00 P.M. and in the time until I bring the Radicals to Guru, I will also do the Vocabulary and Kanji lessons that I already unlocked to make sure I only get the Radicals at 10:00 P.M. (I don’t do all Vocabs and Kanijs at once, though, only like 20 to 30, maybe 40 if I’m bored, at once), and since I only review the radicals there, this should be possible in quite a short time. The next reviews of these radicals would be at 6 A.M. then, so I do them at 7:00 A.M., then the next review is next day at 7:00 A.M. and then two days later, again at 7:00 A.M., I can bring them up to Guru.
Then, when I unlock the Kanjis, I instantly do the rest of them in the time span of 7:00 A.M. to 8:00 A.M., so the first review will be at 11:00 A.M, the next one at 7:00 P.M., then the next one at 6:00 P.M. the next day and then the final review two days later at 6:00 P.M, completing the cycle and setting up the same procedure for the next level.
As I said, I do the Vocabulary lessons somewhere in between these stuffs, but always make sure that I do them while I am still at the same level at which I got them.
That is what I plan to do, but it might change over time.