Are you using a thermostat for your heat pads? If not, please invest in one as soon as possible. Those mats can get very hot if uncontrolled!

Your temps seem pretty good, the cool side is a little on the warm side but only by a few degrees. I wouldn't use a CHE on top of the heat mats if those are your temps without.

As far as the substrate temp goes, your thermometer probe is in the right place. Just in case the snake burrows a little bit, you want to measure underneath the substrate for your hot side temperature. If it feels cool to you, that's probably fine! Human body temperature (ranging from 97-99 degrees) is higher than the 92.5 you're measuring, so it makes sense that it would feel cool to you. Your substrate should be fine, it should dry out periodically as well, but if it doesn't, increase the ventilation in your tank for a little bit. And DEFINITELY invest in a digital humidity meter, your humidity should be between 50-70% normally, possibly a tad higher when your snake is in shed.

Lastly, I'm a beginner as well, so my opinions on this shouldnt be the be-all-end-all answer for you