I'm no techy, but I'm pretty sure USB-C is essentially the same protocols, so that an adapter should work fine. If it was an older machine it might be the bus speed that slows it all down, but essentially the data should still transfer fine. If your laptop is quite new, then the bus speed should...
So have you sorted it? There are USB to USB C adapters you can buy, then a multiport hub with HDMI, memory card slots, USB and USB C ports. Sorry if this has already been suggested.