Honestly, it gets easier as time goes on. It's just a steep learning curve at the beginning.
The Libre can be off, for most people it only is off by a lot the first 12-24 hours you wear it. But some sensors are off more than others and if it stays off by more than 20 or 30% you can call Libre for a replacement. It will cut down on meter testing and is invaluable to show your responses to food, exercise etc by it's trends alone, If it's headed up you know you might need a correction or to wait to eat. Or if it's headed down you might need to eat something right away. As
@porl69 has said it measures interstitial fluid which is going to be about 15 minutes behind your meter.
At the beginning you are in what we call your honeymoon period, it varies how long you are in it. But it can even last years. It's where you still make some insulin, and slowly you stop. This can be a more difficult period sometimes because one day you need more insulin and another your pancreas decides to help and you need less. But over time you will slowly need more insulin.
I don't know if you are on set doses right now. They sometimes start you at set doses. But learn to carb count, you will need to know eventually anyways and the sooner you learn the better control you will have.
And the most important thing is to always keep a hypo treatment within easy reach at all times. Jellie babies work or glucose tabs. I suggest juice or something else easy kept by your bed. And some kind of hypo treatment in your purse to take with you.