Regardless, simply put, you need to gain both Activity (by posting - with a max. of 14 gainable Activity points per two weeks in general terms, although it’s a bit more complex) and Merits (by posting decent content that others may or not award Merit to at some point).
You currently have a standing Activity of 35 and 0 Merits, so your first potential next rank is Jr. Member, which requires >= 30 Activity and >= 1 Merit.
With the above in mind, reread the OP, and the enclosed link to the thread that explains the Merit System. It should be easier to follow now.