I'm 46.5, which, if my calculations are right, puts me about 1.5 yr away from potential retirement. I'm looking at the 4% rule, but trying to be extra cautious

I'm 46.5, which, if my calculations are right, puts me about 1.5 yr away from potential retirement. I'm looking at the 4% rule, but trying to be extra cautious about it –- not counting the house, factoring in taxes, etc. The biggest thing holding me back is the fear of becoming utterly useless. I can just picture myself endlessly scrolling the internet, basically waiting for the day to end (besides, obviously, getting more exercise and generally being healthier, those are the positives). Working in a megacorp can be great. I greatly enjoy my current job, but I just wish it had more breaks in it (ideally, guilt free).