My two cents?
I started learning how to snowboard was at 35. I understand your situation very well. I took carpet lessons (as I live north of Dallas) the week before I left to go to the snow. I scheduled a full day private lesson with an instructor at Eldora. The girl spent three hours with my working my turns and stops (OK, because I kept falling into the mountain working toe side). After lunch, we rode greens and easy blues. I didn't go very fast, but I spent the next three days working and moving down the hill. I had a blast.
The worst falls I had happened after I learned to ride, when my brain told me I could do things my skill level wasn't ready for...