DMV Appointment for Learner’s License

I’m trying to get an appointment to give all the documents to get my learner’s license. Appointments are booked until September but the website says, “Appointment slots are opened daily. If no appointments are available, check back the next day for additional slots or potential cancellations.” Are there actually ever additional slots? Should I wait to see if a slot opens up? Also, what time is best to check (if they do actually open up)? Or should I just book for November and try to do a walk in?? I’ve read you have to be there at like 4am for the latest. Is that still true?? Is there any DMV (in Broward or Miami-Dave) where I can walk in when it opens and get seen? Also, are there certain days you can walk in?