Will there be any sub-categories for each restaurants like where you start from level 1 to expert level, since game itself takes a long time to play.

Also starting from certain restaurants for segmented run is quite tough for playfirst games due to the save data is complicated and hard to manipulate (except Diner Dash).

Maybe one day i'll provide a tutorial for how to unlocking levels and restaurants on DD2, DDFotg, DDHH by modding the game scripts (it wouldnt change other functionalities of the game)