Adjusting to the whole idea of having diabetes can be rough. It's not just the physical management but it's emotional and psychological as well. It's good that you've started on both the basal (Lantus) and bolus (Humalog) insulin.
To help refine your blood glucose management, I encourage you to keep and review records. It can be had written or stored on a computer. Sometimes its hard to see patterns until you review several days' records.
You need to become your own expert on dosing insulin, selecting appropriate foods, and getting regular exercise. Doctors can help somewhat but they are a non-factor for the multiple decisions that you must make every day.
I'm a big fan of the "eat to your meter" concept. Let your post meal blood sugar numbers guide you as to what foods help and what foods hurt. Many here adopt a limited carb way of eating. We each have our own daily limit of carbs that when exceeded causes too many out of range numbers. Some people can eat 150 grams of carbs per day or more but many of us eat less than that. Under 100 grams of carbs per day is not that unusual.
Diabetes is a disease marked by carbohydrate intolerance. Find you own personal daily carb threshold and try to stay under it.
Welcome to Tudiabetes. You've found a great resource for living with diabetes.