Welcome to the team - I too was diagnosed with T1 as an adult. In fact, it is a well kept secret that over 50% of type 1s are diagnosed as adults.
Thankfully, I have not experienced hair loss so cannot comment on this.
As you are on Levemir and Novorapid, you are on a what is know as basal-bolus.
The Levemir is your basal - this mops up the glucose which is constantly dripped from your liver throughout the day. There may be a bit of trial and error to get this to the optimum level.
The Novorapid is your bolus - this is used to manage the carbohydrates (which break down to sugar) in your food. Unless you eat the same meal every time every day, the amount of carbs in each meal will vary. You may have read about carb counting. This allows you to adjust your mealtime dose of insulin to match the carb-content of your meal. If you are not doing this, there is a risk you are sometimes having too little insulin (resulting in hypers) and sometime having too much insulin (resulting in hypos).
If you are in the UK, it may be useful to find out about a local DAFNE course which will give you some pointers about this. The quality of the courses vary around the country but the general opinion is you will get most out of the course when you are first diagnosed.
It is not possible to comment whether your doses are unusually high as they depend so much on what you are eating as well as other things. Unfortunately, whilst food is the main driver for insulin demands, there are others such as stress, illness, drugs, exercise, ... These are harder to count than carbohydrates but over time (unfortunately via trial and error) you will learn how your body reacts.
It is common for people with type 2 diabetes, to limit their carbs. Some people with type 1 may also do this but it is not as common. It is a personal preference. But I have never read about a strategy to reduce carbs in order to reduce insulin doses.