It’s a shame you’ve had to wait a year. Sorry about the hernia thing ! But the truth is if you don’t use it then you lose it , possibly permanently. When I first used it , it was quite sore and the head filled with fluid and looked distorted etc but I persevered. In fact 5 1/2 yrs on with amazing erectile function I still use it 3 to 4 times a week just whilst shaving. It’s become part of my life and I think has paid amazing dividends tbh.
As for soreness I’m not sure. I’m circumcised so I guess the old fella is a bit more resilient than most. I would say use any cream that is non-perfumed or scented , or even just Vaseline to moisturise .