Each section has a first pass time frame estimate, try to constrain yourself to only focusing for this amount of time before "shipping" and moving on to the next task. These time estimates do not represent a final version of any of these portions of your professional profile, just a first pass. It's important to make a profile and persona then update it and work on it over time. Time you spend with no presence is time that people won't know who they could be hiring!
Make sure that you have a picture of yourself, education, and job history on your LinkedIn profile.