Retirement is the FIRST time in life that you really can do what you want to do with your time. Other than the necessities of life, that is. We all have to eat, clean, etc. no matter whether retired or working, so that doesn't count toward doing exactly what you want to do.
Retirement has been a joy for me. Took up quilting, grands in summer, some volunteer work, some just loafing around; my time serves me well. I do have too much fabric, so have started donating it, or cutting it into strips for charity quilts.
Enjoy, enjoy, enjoy.