Basically Invisalign and clear path is a good choice but cost and time will be depends upon your case like rotations or extraction case taken much more time. In each and every cases the number of trays will be decided the cost and time. Sometimes some cases will be not cured by clear path or Invisalign. Please consult with orthodontist.
Next Steps
First you go to orthodontist and he will taken your records like impression, profile picture and your X-rays for your analysis and treatment plan.