What product to use after hair transplant to make the hair soft or at least like it used to be.

I have had the surgery 24 days ago in turkey, i have 2 friends who's done it with the same Dr about 8 months ago. However, one of them who had almost the same type of hair as me got his hair grown and it looks so good, but I noticed that his hair is kind of curly or at least not like it used to be, to avoid any problem like this in the future is there any advice that you can give me to avoid this issue and any advice to make it look so good, or products i must use, when to use it such as shampoo