Welcome Tozo. All the above are good advice. If you have 3.2m in investments that return income and/or grow in value, not including your living quarters, you are in great shape. I personally am targeting a SWR of about 3-3.3%, retiring by 50, but most would say that percentage is conservative, offering 4% as a good target. So, are your expenses (incl investment expenses and tributes to your uncle in Washington) less than 3.3% (or 4%, depending on your way of thinking) of your invested, cash generating assets? If so, you are ready financially, especially if the 3.2m is after the decline in stock values (remember to account for health insurance). Are you emotionally ready for the change? What will you do with your time? ...etc, etc are things only you can decide.
Another poster has mentioned contractual obligations resulting from the sale of your business. I will bring up a related and similar, but not the same, topic. If you have an earn-out (a payment contingent on the ongoing success of the business), you may want to stay a little longer and make sure it continues to work. The reason is that we don't know where the market (your investments) will be in the next months. I often give career related lectures, and the advice I am giving right now is that if you have a job, don't quit. Finding a new one may be next to impossible in the coming months. If you know you are ready, I'm sure you will be fine, but if there is any doubt in your mind, wait to resign until all of that doubt departs.
R