Just got my first dog! Need some training advice

She is a rescue, one year old pitty mix, and such a good girl. She really is a well behaved dog, very calm and respectful inside the house. She has responded well to training by her foster parents (crate trained, potty trained, and can sit). I’ve been working with her on lay down and stay and that’s going good too. She’s quite smart.

I’m hoping to get some insight from y’all because she has a really hard time outside. She’s basically just a nervous wreck. When she hears any sort of noise in the general vicinity she freezes (especially other dogs), when cars pass she’s freaks, the poor thing is super stressed out. She does like to play fetch and stuff- I have a fenced in backyard that she does a bit better in. She’ll lock in for like 1 minute playing, then she’ll get distracted for 2. The main problem is that she completely stops listening when we go outside, just cannot get her attention. She’s not interested in treats at those times either. There was like no way to get her to walk without pulling today, I hate having to do that. Hopefully with some training and exposure, she can actually enjoy outside and learn to be a good walker. Let me know how to help my dog acclimate to the big scary world!!

Also any general advice welcome! I always dreamed of having a dog but I never grew up with pets or had one of my own so this is all new to me. I am lowkey a neat freak so I want to run a tight ship. Is it possible to have a dog and a really clean house lol ?