Retirement requires planning as for most there is NO mulligan, ie returning to the same high paying, benefit rich job.
Many are just anxious to quit working, ie retire at age 62 with a greatly diminished SSA benefit. Few explores even genetics, considering their health, as to their likely longevity.
Living on SSA is NOT retirement. At best it spells existence with no financial cushion to handle those unplanned expenses that crop up.
It would be wise to try living on one's projected retirement income for one to two years before quitting one's job. Granted, this is not an apple to apple comparison, as health care will be different. One must make allowances, adjustments.
The ONE recommendation I would make is jettison the DEBT, ie especially mortgage and credit card and commit yourself to living within your means. Some are disciplined and can do it. Once retired our only choice is returning to work, but at what income?
There online tools to estimate need but that is worthless as our needs, expectations are as different as are we. We MUST learn for ourselves and not rely on someone else's guess. My conservative parents retired and still socked $$$ into savings, just in case an unplanned need arose.