Certainly try reducing your basal. That seems very sensible.
There’s no amount of carbs you have to eat. You’re supposed to eat your normal healthy diet and take the insulin you need to cover it. 120g carbs doesn’t seem very many. If you’re purposely limiting your carbs, that’s not going to help your ability to go for walks or your mental health. Basically, you just eat what you would have done before and take the appropriate insulin. Type 1 is nothing to do with diet, and everything to do with insulin.
So, cereal, toast, sandwiches, fruit, cereal bars, pasta, rice, potatoes, yoghurt, ice cream, an occasional dessert/piece of cake, just like you probably ate before. You don’t aim for a daily total. You just eat normally. You’re only counting the carbs in order to calculate your bolus insulin
not to limit them
@CathyFP