use thunderbolt as a extra usb?
hello, I have a 2017 MacBook Air, it has 2 USB ports and a thunderbolt port ( I get confused on thunderbolt as it now seems there are a few different versions, I would like to use an extra USB port rather than faffing about with a usb hub and was wondering if firstly a thunderbolt to usb adaptor exists and secondly if so (as I cannot seem to find one on the web or on the apple store website) can it be used to send it a video signal from a webcam or a good quality sound signal from and external sound card.
MacBook Air 13", macOS 10.15