Late to the thread but want to offer my suggestions and advice.
OP - I get where you are... emotionally ready to retire. I had been working towards retirement and had a bad meeting with my boss one week and gave notice the following Monday. It was liberating. But, as said, I'd been working on my plan, and getting advice here for over a year and was confident I was good to go.
Check out the link that was previously posted.
https://www.early-retirement.org/forums/f47/some-important-questions-to-answer-before-asking-can-i-retire-69999.html
As others have stressed - you need to be solid in your understanding of your spending. This is *all* inclusive: taxes, health care, lumpy expenses, discretionary stuff like travel, etc.
I found the best way to get confident I had a handle on my spending was to approach it from both directions. First: start from your gross income, deduct off things that will go away when you retire like 401k contributions, savings contributions, medicare and SS payroll deductions. You come up with a number that is the money that was spent... in theory. Second approach it from the other end- add up your fed/state taxes, household expenses, groceries, vacations, utilities...
The first few times my two numbers were off a lot from each other... so I looked at the bottom up spending for things I'd missed. I ran this excercize until the numbers were the same... I knew I'd figured out where my money was going.
Then in prep for retirement, I looked at things that would change: No more contributions to retirement savings.. different premiums for health insurance... food bill would change with more home cooking.
My biggest expense was our mortgage payment - and a month before I retired I paid off the mortgage. That meant a lot less cash needed a month.
I retired almost 10 years ago with a similar number, but also with 2 kids under roof. But we also had a granny flat bringing in income each month, as well as DH already being on SS. I was terrified.
For me the way I dealt with the fear was by getting super frugal for the first few years. I've eased up on that but I found there were things I cut in my fear, that I never missed... and therefore never added back to the spend.
Read the link above (FAQ)
Get super familiar with your all-in spending (taxes and healthcare included).
Run all the calcs, especially firecalc.
And if all signs say go... Pull the trigger.