2023 estimated tax deadline missed twice. How do I divide the payments for remaining deadlines?

I just started working as a freelancer this year and didn't know about quarterly estimated tax payments until now . I understand that I missed the April and June payments and am willing to pay any penalties, but what I was unsure about is how I should be paying for the remainder of the two deadlines.

Do I still need to pay estimated tax as 4 separate payments or should I combine the April and June payments to the September payment? Or split the amount into two for September and January?

I was so used tax being simpler with just w-2s until layoffs happened and now I'm very unprepared on how freelance tax works so any help is very much appreciated!