Retirement affects everyone differently. Those who make the transition with minimal disruption are those who recognize that they will someday need to retire, and plan for it ahead of time....especially from a financial aspect. If a person enjoys their job, and the interaction with others, it can be a bit difficult to suddenly not have to go to work, and not be around those you've worked with for years.
If a person needs a "retirement coach", they should consider finding one when they are in their 30's or 40's. Waiting until the retirement day comes just insures that the transition Will be difficult. There is ample data about what it takes to have a decent retirement, and younger people would be well advised to do their own research....well in advance.
The basics, IMO, consist of taking care of health, being debt free, and building a decent "nest egg". If a person can retire with minimal financial concerns, and their health is good enough to enjoy doing what they want, retirement is good.