Regarding the less than ideal audio conditions, there are also already models that have impressive noise cancellation. Like this https://github.com/Rikorose/Dee

Regarding the less than ideal audio conditions, there are also already models that have impressive noise cancellation. Like this https://github.com/Rikorose/DeepFilterNet https://github.com/Rikorose/DeepFilterNet one. If you put them in serial, maybe you get better results?