Missy, The the initial blood sugar numbers you gave us were all under 200. That is not so bad for right after diagnosis. Is it still in that range? If so just start with the metformin and shoot for 150 minute of moderate exercise a day (this reduces your body's need for insulin). Learn a bit about how to identify carbohydrates, so you eat less and don't have to work so hard to produce as much insulin. It is OK to have a treat sometime, but pay attention to how much sugar you eat and drink.
If your numbers are still below 200 you can even cut back on the metformin for a few days to help you adjust to the new medication. You can go back up on the dose over time.
Over the next month, you will want you morning blood sugar to be in the general range of 125 to 160 or the number set by you provider. People with well controlled diabetes live a long and healthy life, you just need to make it past the first week.
If after a month you need more medication to help you control you blood sugar ask you provider. Be an aggressive advocate.