>>2020841oh, saddle fit. stock saddles are usually for twinks and suck in other ways. you "perch" on the saddle with your weight distributed between your feet on the pedals, some weight on the arms on the bars, and the slight majority on the saddle.
a saddle that fits you is wider than the distance your "sit bones" are, and that extra width varies: the more aggressive your riding posture is, the less extra width. how the sitbones engage with the saddle varies with how leaned-over you are.
the upshot is you have to try different stuff, but mashing your assbones into corrugated cardboard and measuring will give you data to start with . also, when noob, even a perfect saddle will hurt the soft tissue over the sitbones until your body gets used to cycling. there's differing charts out there, try different stuff .
also look up saddle height, very important. it will feel weird when it's correct, if you want to start a *little* lower at first it's ok (you're going to do it anyway) but you need to mentally divorce yourself from "I want to put both feet flat on the ground when stopped". you can dismount and stand on both feet, or stay seated and lean over and put one foot flat on the ground and keep the other on the pedal
