I would read or listen on audible to Dr. Fung/Jimmy Moore’s book, The Complete Guide to Fasting. Ann Bosworth’s any way you can is an interesting read with a story woven into Some easy u dermatitis biochemistry.
Agree with some of the other posts, no fruit or fruit juice, you may as well eat spoons of sugar, it will knock you out of ketosis. Your gut has been idle for some time so refeeding your first couple meals with foods that are low in fiber is a good idea. I like a full fat plain yogurt like Fage’ Total. Coffee with a good medium chain fatty acid powder. Read the labels carefully, some of these powders have dexstrose (sugar) as a filler, also make sure they spell out that the fats are 8-10 chains long. These short and medium chain fats get to take an express trip to your liver and are nearly instantly turned into key tones. Long chain fats like butter and cream are great too, they just take a longer path through your body to get to your liver. Coconut oil has a mix of medium chain and long chain fats so it works as well, I just don’t like it in my coffee. Unsweetened whipped cream is another refeeding favorite or mine as well as olives. Medium hardness cheese and eggs are also good refeeders.
You mentioned your love of meat, me too, but I had to switch from lean cuts of beef to fattier cuts like a rib eye also sausage, bacon and eating chicken with the skin. For a great list of recipes hit: http://2ketodudes.com/recipes.aspx