I don't know how social you are, but have you considered joining some kind of lively, real-life community? If you lean to the political left, you might try your local Unitarian church. If not that, then some other community group.
I used to be very goal directed, and have always been something of an introvert, but in early retirement I've learned that social connections make all the difference. People I've met in retirement introduced me to an entirely new hobby -- one I had never even considered before, but now I love.