Hello Dragonflye!
Well I waited 5 years for my pump, fought really hard for it and had done loads of research on them and yet I had the most awful start when I actually got it!
Like you I've been carb counting since I was 4 and have often had terrible hypos or severe highs, due to having brittle diabetes. I had managed my diabetes to the best it could be on MDI but the pump was the only real solution for me. It was and still can be tough going but it is so worth it.
When you start on the pump they reduce your whole insulin dosing to make sure you don't have severe hypos. For me they reduced too much and I had crippling highs. Looking back I wish I had upped my basals myself rather than waiting for permission to do it. I wouldn't have felt really ill with BG levels of 17-20 every day.
Another thing is giving it time and accepting that you may hate it at first. I knew about being connected 24/7 but I still went through a short period of really hating being always attached. That WILL pass. I don't think about it at all now.
At the start I didn't trust it was working and I felt really scared, especially going to sleep at night. Again this passes and not everyone feels like that.
Pumping with a baby is tough. My son is 18 months and I try to conceal the pump or he would be far too interested and pull at the tubing and set. As he is too young to understand he sometimes climbs on me or hits me where my infusion set is and that can be sore. Also timing a set change around a young child takes planning. My pump (Animas 2020) has a child lock - a lifesaver for when he catches the button! The pump can be awkward when trying to carry a toddler but you get used it and again you might not find this depending on where you keep your pump.
Kinked cannulas - the worst issue for me. Had a few early on due to being a novice and then I was fine for over 6 months. When the hot weather arrived it made my cannulas softer and caused them to kink. Since putting them in the fridge no problems!
The pump constantly needs tweaking as your life changes all the time so that can be hard work. Also I get hypos running round after my son when I hadn't been able to predict a really active period with him. My hypos are much more managable though and I need less glucose to get me back on track.
Overall I find that the benefits of the pump, which is giving me control I never thought possible, still massively outweight any negatives.