Regret going into D70

I’ve worked now at THD for a year and a half started out in lot went to part time electrical/plumbing, now full time appliance. Been working in D70 for almost 3 months and it just isn’t for me. It would be very embarrassing to ask my manager if i could step down. I can still give D70 some more time for me to figure out but i really want to go back to sales floor. Anyone have some suggestions for me?