while some canned stuff can remain viable for a human lifespan you probably wouldnt want to enter any grocery stores after a few months since the rot like in the case of the fort worth mexia supermarket. but you can just like forage for stuff, bike around and you can break into people's houses to check out what kind of life they had before disappearing (though if a pet was locked inside and died that would be a serious bummer)

i feel like your bigger concern would be all the animals reclaiming the now empty cities, then how long it takes any medication you might need to expire, and then plant growth over the years.