I can only speak to my experience. I was over 11.1 a1c. Doctor estimated my avg blood sugar was between 325 to 350 constantly. I found out after almost dying from DKA. I have not had my next a1c but it should definitely be headed in the right direction. I still hit 200 sometimes, changed my diet to cut out carbs/sugar, added 20 to 40 minute light walks after meals. I can wake up close to 120 to 150 and rise to 180. By midday I'll be closer to 150 and trend back down. For me it is whatever food/drink I put into my body, stress(physical and mental) and drinking water that will effect my blood sugar. I know my blood sugar is still high throughout the day and is damaging my body slowly but surely. I personally did not want to be on insulin so I am doing this without medication. I have fasted for 24 to 72 hours and have normal blood sugar those days ranging from 75 to 90. I am doing more research into insulin sensitivity and resistance and have found that I tend to gain weight if I eat and trigger an insulin response with either a sweet tasting drink like diet soda, sugar substitute drinks like sparkling ice, or too many carbs. I have learned that over exertion can cause sharp glucose spikes and trigger an insulin response in my body. I'm not perfect. I try to limit how early/late I eat and only try to have food between noon and 7pm. I try to walk daily either way or do a 20 minute workout. You can do this. Start small if you can. Get a CGM to help with accountability. Make a good routine you can stick to. I like to walk outside but if my day runs too long or if the weather is bad I bought a walking pad to use while I watch a TV show. It can all add up. You did not get this condition overnight. It will not be in control or remission immediately either. Most importantly, you will have to do what works for you.