So you mean running two external monitors in addition to the built in screen? Or two monitors including the built in screen?
If the Mac's screen is one, then you just need this cable I think (if it's an HDMI monitor):
https://www.amazon.ca/AmazonBasics-M.../dp/B0134V3KIA
Two external displays requires something more complex, one of those external docks, or there are cheaper devices which will hook up a display via USB (DisplayLink is the technology they use), though these were messed up in a recent macOS update and I'm not sure if they're fully functional or not again.
Whatever you get make sure you get it from somewhere that takes returns so you can return it if it doesn't work, we've got a bunch of different devices at work and they're all hit and miss now.