Great to hear you are thinking of retiring. I have been lucky to have many interests and over my career have been able to take off a year or more four times to just pursue my passions… physical and intellectual. So, my interests instantly take over all my time.
The way you put the idea you were thinking of retiring and then decide what to do. You might consider slowly moving into retirement and developing other pursuits along the way. I know a lot of retired folks and those that just quit without a bunch of passions can have a hard time. The rule of thumb is it takes five years to adjust to retirement. My transition was really easy for the reasons I said… but there was still a transition from being so goal oriented (by conditioning all my life) to being more process oriented.