Paper training
Whent its time to move toileting outside, take some soiled paper / litter out to the place you want puppy to go toilet. Take puppy out to the toilet area several times a day (puppy is more likely to go toilet first thing in the morning and after meals, go again just before bed-time). If puppy starts whining, sniffing in corners or circling, take it out to the toilet area. Give puppy PRAISE for going toilet in the toileting area, then dispose safely of the poo.