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You should add sober and on a well maintained bike before people find examples of you falling off while drunk or breaking a bike that was not really road worthy. You’re bound to have examples on here, most of us do.
As for whether you should go for a solo ride in the daylight to get air, exercise and try to hold onto some sanity, of course you should.
How far? I’d say a couple of hours at a moderate pace would be no more risk than a ride to the corner and back.
I don't consider a solo bike ride in daylight to be a risk.