I haven’t had a surgery yet but honestly, these sound like typical thoughts of a person that’s not been on the dating scene for a while surgery or not, these are all hang ups that people worry about when getting ‘back in there’. If you meet for drinks, make an excuse for not drinking alcohol, perhaps you had a few too many the night before (they’ll be amazed by how well you handle a hangover!) and as for food, just don’t arrange a dinner date? Maybe arrange a walk in a park or bowling? This way, you can always figure out if like a person enough before you give them your entire history? Good luck