For me, nothing makes online classroom management easier than when students are able to act independently. This is my favorite strategy because at the end of a teaching session I can look back at all the progress everyone made, even if I was super busy with just a few students!
Once you know that students are able to interact with their work, set a daily expectation of independence. I tell students each day that they should log into Google Classroom 5 minutes before the start of our class and be on the page of their work. Of course, that never happens, but since I expect it they do usually get logged in right away once class starts!
Then, I do a quick check-in to make sure that each student is in their work, saying out loud that I see their little bubble and going over the daily tasks. If you have a class that it more than 10 students, this may not be possible every day but you can quickly check students’ bubbles and remind all of them that you are doing that.