Newbie Questions

I’m trying to get started into all this and am pretty new to the selling portion. I’m trying to figure out where to start without overwhelming myself. I’ve been thinking of starting with selling products like used items and considering pictures. What did you guys start offering? Do certain things have higher chance of success than others? Also, do you find it better to do things that align with your own kinks/fetishes or stick with what’s more likely to be successful in the beginning?