Connect 2 external monitors (1 VGA + 1 HDMI) to MacBook Pro
With that adapter, you can only use 1 video output at a time.  From the product description in the link you provided:


  Alternative Video Outputs: Connect a display to your computer using
  either the HDMI port (4K@30Hz Max resolution) or VGA port (1080p Max
  resolution). If both are connected, only HDMI will output


Emphasis mine

To connect two monitors, you need two video adapters - an HDMI and a separate VGA adapter. The following should work:


Type C USB-C HDMI Active Adapter
USB-C Thunderbolt to VGA adapter


I always recommend using Active Adapters because they regenerate the signal from DiaplayPort to actual HDMI or VGA signals.