Advice about carb counting: Weigh or measure everything for the first month, and every couple months after that make sure to re-weigh and measure for a week or so to make sure your "eyeballing it" doesn't get too sloppy. I drew measuring lines on some of my dishes with measuring marks so I didn't have to dirty up a measuring cup with sloppy food (I really am that lazy sometimes!), and every now and then I re-line my cups and bowls just to help me stay on top of serving sizes. None of it is exact though, nutrition labels on food are only required to be accurate to 80% and I think thats by weight, so given that each piece of bread in a loaf isn't exactly the same size..., and fruits have guidelines, but even then the size and ripeness of the individual fruit pieces changes the carb count (a nectarine in Alaska has about 15 carbs, a nectarine in San Diego has closer to 30 carbs). If you find that you always go a little high after eating a green apple, just assume that the apple is breaking the rules and change its expected count from 20 to 30, or whatever number makes sense given your average piece of fruit.
Although I don't do it, there's a contingency of people that use carb factors instead, basically they weigh everything and multiply by the "factor" of what percentage of the food is carbohydrates. Its way more accurate than regular old carb counting by eyeballing portions and reading labels, but I haven't gotten excited enough about accurate carb input to try it. I wish I did though, it would take out one more variable of why things don't work the way they're supposed to!
Intro to Carb Factors
As for the show & tell portion, I don't use a pod but I do have a pump and CGM and I had come up with some very carefully worded statements and answers using the "perfect" combination of simple explanations that a non-PWD would understand without downplaying or overly simplifying it to use in just a situation whereby I thought (and this was all hypothetical) it would be important to tell someone what was going on under my clothes before I wasn't wearing any. As it stands, it came up in a discussion in the very very beginning because I was wearing a sleeveless bike jersey (we were biking, so it made sense) and had "a thingy" on the back of my arm. My pump took a few more days to show up but only because I had the site on my butt and didn't think I should show that in a public place (I put the next one on my belly so I could finish the showing). Although I'd worked hard on them, I didn't have a chance to use a single carefully worded phrase because it just came up on its own instead.
It turns out its totally been a non-issue, I don't go to any length to either display or hide my gear, and so it generally just comes up on its own in a totally non-intrusive and surprisingly not awkward conversation. My advice: don't stress over it, when it needs explaining its really easy to do, especially if you are excited about it and covey that in your answer ("That is the coolest piece of medical equipment ever! Its an insulin pod and it puts insulin straight into my blood stream without me having to use a syringe every time! Isn't that cool?"), and to the people that don't matter , you can have fun with it (" Oh that? I'm testing a new music delivery device, it pumps the music right into my blood stream; you can't hear it can you?" and other such absurd responses are fair game for the nosey old guy behind you in a line at a restaurant). You can always take the 'this is a good chance to get some education out there' option, but thats up to you.
It'll get easier after the first few months, and its totally worth the annoyance of getting it figured out, just stay patient and expect a steep but totally manageable earning curve! Good luck and enjoy!