answer
I mostly do not use and do not know so much about chess websites, that you have to pay for. Therefore I cannot fully recommend such platforms.
There are chess youtubers, who might have upcoming or ongoing chess courses.
Those courses might not be for free, however, recently there was a course of breaking 1500, made by Nelson on the Chess Vibes channel. That course was pretty expensive, as it was open (197 American Dollars), but now it has become more expensive.
answer