Iphone XS user investigating apple watches

Hi, all. The last couple of years I thought about getting an Apple Watch so I wouldn’t have to take my phone with me on my exercise in the neighborhood. And now it looks like I’ve got to change from Dexcom G6 to the G715 day pretty soon as well. I’ve just been using a polar exercise watch that I’ve used for years to track my miles and my weight training and stuff. But it is time that I get a new or used Apple Watch and I do not want to pay for the feature of being able to make phone calls, so I’m just looking to see what yawls experiences have been and see if you could recommend the model I should get. I am a Luddite and will not be getting a new iphone until I have to. And I am perfectly comfortable buying a used Apple Watch on swappa or some other site. But if the catch is worth the cost, I guess I would buy a new one. So if you could look into your crystal ball and your experiences, I’d sure appreciate specific Apple watches to look for. I’ve got the information from Dexcom about the list of all that work with Dexcom, but I’m just wondering if some are better than others. I have small wrists and I would love it to track my sleep data and my mileage and times when I’m running and walking and weight training. Also, if some easier to use than others, that would be nice to know. And maybe none of that really matters and I just picked for features or something. I’m just 100% ignorant and thought I would save myself time and ask y’all first and then investigate specific ones. Thank you in advance for anything you can advise me about. I sure appreciate it as always! Thank you! And I must say it will be a dream. Come true not to carry my phone all the time. If I had an emergency on my 4 mile to 6 mile route, I have peoples doors I would knock on, so I think I would be safe. Plus I plan well. Thank you.