Physical Danger
If you're afraid of the injuries caused by an espresso machine, we'd like to remind you that global warming is real, the waters are rising, and we will all perish one day.
The injuries you'll face as a barista will be nothing more than some cuts and scrapes, some minor burns, and maybe you'll slip on the floor every now and again. Just buy some non-slip shoes (with good arch-support, because why not?) and live your life. To put it more simply, you are at very minimal risk. This job isn't much more dangerous than your own kitchen (source).