Will the food be ruined in the crock pot?

I leave for work at 7:30am and I don’t get home till 6:30 at the earliest.. most days 7.. so I’m gone for damn near 12 hours

I’m tired of eating dinner so late and I just want food ready to go when I get home

I have a crock pot and I want to make birria tacos but I’m afraid after that long in the crock pot that the meat will be like boot leather even on low