How Do I Make My DNS Server Work When My IP Address Changes?

i've always wanted to have like a little circuit python project that would be fun so originally i wanted to get a raspberry pie those are unattainable. It turns out you can find them for about a hundred dollars on on ebay right anyway they're hard to get and then if you get them they're way marked up and it's kind of frustrating well what else could i use? So check this thing out see like i got on the screen here  this adafruit esp 32 dash s2 feather is a full-blown circuit python in our our doingo basically for 17 dollars and 50 cents and it's in stock niceso i was actually thinking of you last night when i