Hi and welcome
As
@grovesy says the numbers you mention don't seem to add up to anything logical as regards diabetes apart from the 60 which would likely be an HbA1c reading which is the test used to diagnose diabetes and the threshold is 48 so you are obviously well above that but we have many members who were in 3 figures at diagnosis so not desperately high. The 20 might be a spot Blood Glucose reading usually from a finger prick test which would be pretty high but without knowing for sure what has been measured it is difficult to say and the 38 makes little or no sense. I wonder if you were so shocked by your diagnosis that you misunderstood/misremembered the numbers.
It is good that you have had your feet tested and will be referred for eye screening and yes, always wear slippers in the house to protect your feet. We are prone to damage to the nerves and blood vessels in our eyes and feet and this can make them vulnerable to damage, which we might not notice due to impaired nerves until infection sets in.
As regards the Metformin, make sure to take it in the middle of a substantial meal as it has a reputation for gastric upset.... it is not commonly referred to as "Metfartin" for nothing and wind is sometimes the least of your worries with it, but side effects if you do suffer them can often settle down after a week or two. If they don't, get back in touch with your nurse and ask for slow/modified release version which may alleviate the problem.
As regards diet, diabetes is not just about sugar but all carbohydrates, so you should be looking to cut out the obvious sources of sugar like cakes, biscuits and sweets but also reduce portion size on bread, pasta, rice, couscous, breakfast cereals, pies and pastries. Basically anything made with grains and grain flour and starchy or sweet root veg. Even fruit needs to be rationed and best to avoid the exotic fruits like bananas and pineapple and mangoes etc and opt for a few berries instead. Leafy green veg is great and cauliflower is a diabetics friend as it is so versatile and meat and fish and eggs and cheese and mushrooms and nuts in moderation, and mushrooms and Mediterranean veg like peppers and aubergines and courgettes and tomatoes are all good in moderation... tomatoes are a fruit, so too many particularly cherry tomatoes which are sweeter will raise your Blood Glucose levels.
If you have any queries just ask, but read around the forum and you will find lots of useful information.