Yes, you may directly start with Chemical Kinetics, however, I would advise you to revise Chemical Equilibrium Chapter from Class 11 in brief before beginning with the Class 12 Syllabus of Physical Chemistry, as its the Foundation to Ionic Equilibrium, Solutions, Electrochemistry and Chemical Kinetics.

For more information about Chemical Kinetics do follow the link below

https://learn.careers360.com/chemistry/chemical-kinetics-chapter/