With reference your query, below is the actual flow of process for
Canada Express Entry : -
1.Enrol yourself in one of the program.
FFederal Skilled Worker Program (FSWP)
Federal Skilled Trades Program (FSTP)
Canadian Experience Class (CEC)
A portion of Provincial nomination programs
2.Initially, you need to update your profile.
3.If it meets basic requirements of CRS then, you'll be allotted CRS points.
4.Candidates with no job offer from an employer in Canada will be required to enrol themselves with the newly upgraded Canada Job Bank
5.Profile will be assessed and candidates who meet the criteria will placed into the pool of Express Entry
6.Candidates are given rank based on certain skills and job offer. The highest scoring candidates will be picked and issued invitation to apply
7.Successfully selected candidates will then apply for Canada PR under any of the aforesaid federal economic immigration program with a period of 60 days.
When to Apply For Canada Express Entry System?There is no specific time to apply for Canada Express Entry system. Interested candidates who abide required eligibility criteria can apply for Express Entry system at any time. After creating the profile, candidates can also update their profiles in the Express Entry pool.
Here's Detailed Link : Canada Express Entry