im struggling with not enough usbc ports

Hi i have a macbook air M1 with 2 usbc ports and a headphone port. I am trying to have one usb as power, one as an external monitor and one as an audio out for a small studio set up using logic pro. . I tried using the headphone port for audio out but it was so awful in quality and at the wrong output level that it isn't fit for purpose. I have multiple usbC splitters but when more than one device is connected none of them work. Also, when i close the lid on the laptop the external monitor goes off and i cannot find a setting to stop it. is there a way out of this without spending more again on expensive docking solutions? Help please!