Please create member types instructor and student from wp-admin -> users -> member types . 

then goto wp-admin -> vibebp-> settings -> buddypress tab -> there enable "Different menu for different member types " . 

then create two different profile menus for student and instructor , 

after this select the the menus for the respective member types : 

https://prnt.sc/3xI0NBXjyWG9

after this one thing would be left is to assign member type to your users which you can do from wp-admin -> users-> select and edit user -> extended profile select member type . 

https://prnt.sc/M9Z2HCqyefuI

to automate this member type assignment please follow this tutorial  :