First is important to note that only ISO 27001 is a certifiable standard. ISO 27002 is a support standard which provides guidance and recommendations for implementation of controls from ISO 27001 Annex A.
Considering that, in a general way, after getting support for the certification (through approval of an ISO 27001 certification project plan) and approval of the Procedure for Document and Record Control, you should consider these for implementation:
defining ISMS basic framework (e.g., scope, objectives, organizational structure), by understanding organizational context and requirements of interested parties;
development of risk assessment and treatment methodology;
perform a risk assessment and define the risk treatment plan;
controls implementation (e.g., policies and procedures documentation, acquisitions, etc.);
people training and awareness;
performance monitoring and measurement;
perform internal audit;
perform management critical review; and
address nonconformities, corrective actions, and opportunities for improvement.
This article will provide you a further explanation about ISMS implementation:
As for the shortest way to get ISO 27001 certified, it would involve hiring a consultant, because this approach will rapidly provide the knowledge, expertise, and methods to implement the standard, although it is the most expensive approach.
Other approaches that can be adopted are implementing the standard using your own employees (the cheapest and longest way), and implementing the standard with a DIY approach and using external know-how (a mid-term approach).
These articles will provide you a further explanation about implementation approaches: