I'm getting a 7 month old dog tomorrow.

I am so nervous, I have no idea why. I haven't had a dog in awhile. My son is 2 years old and I have a small house. Ofc I'm not changing my mind because this baby is gorgeous. I guess I'm just nervous about not keeping the house tidy or maybe even the dog hair? I'm getting a new vacuum tomorrow as well. I have hardwood floors but I have rugs. My current vacuum sucks and the new one has a hose to vacuum the furniture. My husband said itll be my dog and when I got a dog when we first got together (5 years ago) I kept the house clean and I took care of him fairly well. My son got sick since he was born a month early and we stayed 2 months of his life in the hospital in another state. (2 hours away) so we had to give our dog away. I was heartbroken but I couldn't take care of him and we had no family. Our child came first. Well the family who we gave him to loves him and decided to keep him forever. Which was fine because our son was still barley back to good health. Well now he's 2 and very interested in dogs so I figured I'd get a trained one which is the dog I'm picking up. Its just been 2 years since I've had a dog. I feel like I'll have trouble regulating to it which is weird. Why the hell am i so nervous to get a damn dog? 🤣🤣 I know after the first few weeks itll feel like I've had him the whole time. Our family has relocated to our town to be closer to the baby so we have family around now. Can I just have some advice from a mother who has animals and a baby (or children) how was the transition?