WFH portable monitor?

So I work from home and we don’t work from laptops, we have two desktop monitors. I’m wondering if there’s a way for me to mirror my desktops to a portable monitor of some sort so I can work outside on my balcony sometimes! I have a MacBook and I tried to just connect and HDMI cord from my MacBook to my computer but nothing happened lol. I’m not very tech savvy 😬😬