A big welcome to the forum. Congratultions on the birth of your baby! A new baby and diabetes joining your family all in one go ... try as best you can to look after yourself.
In answer to your questions I would have to say that it was very hard to cope with at the start and it isn't until you get some confidence with insulin and knowing what happens to your child in different circumstances that things get easier. Getting some sleep is hard but it is either a bonus or a curse that you will be up with your baby in the night anyway.
I would have to say the first year gets you up to speed with most situations. In that time you will have seen growth, some illnesses, active days, changes in seasons and tried out a heap of different food types.
Don't aim to be perfect. You will see fluctuations in blood sugar and sometimes you wont even know why. I can also admit to putting Khaleb to bed with a bsl of 24mmol in the first few months of diagnosis as I was so exhausted I just had to get some sleep.
My son is on Levemir (twice daily) and Novorapid (breakfast, lunch and dinner). Lots of parents here and we'll be happy to help out by answering with our own experiences.