Yes, as the room gets larger rt60 target times increase.

For living spaces you are targeting 0.45s on the long end to 0.2s to shortest time.

In a large room the longer time. In a bedroom 0.2s.

In a theater or 2ch room around 0.3s.

Measure by popping a balloon and using rt60 tool in Audio Tools or REW.

Carpet, window coverings and plush furniture advantages for sure.

To make it easier on you buy this book:

https://www.amazon.ca/Handbook-Sound-Studio-Construction-Recording/dp/007177274X

Includes everything you need and more.