Building a new house. Need office and kids rooms QUIET-Acoustics Forum-Acoustic Fields Forum

Hey all!
My name is Adrian. I am in the early stages of building a new house. With COVID my home office is my full-time office now. I have 2 daughters 5 and 3. During the day when they’re playing in the living room, I want to be able to handle calls and meetings free of noise distractions. Also when I need to focus on projects I’d like to be able to work in a quiet room without much noise distraction from anything else going on in the house.

In addition to the office… I would like to pay special attention to the upstairs children’s bedrooms as well. I want to be able to cook, clean dishes, watch a movie, or entertain downstairs in the living room and not worry about waking the girls sleeping upstairs.

There is so much conflicting information online regarding materials, brands, systems, strategies. I found this forum and realize it may be overkill here since this seems to be very specialized knowledge… but I would love to hear all opinions on the best way to attack this project. Since we haven’t started building anything yet I figure now is the time to start planning. ideally, I would like the house to appear to be a normal home without any odd or unusual aesthetics.

Thank you in advance and I look forward to hearing your thoughts and opinions and learning from all of you!
Thank you