Hi Laura
If the Alexa you have is the type with a screen you could connect it to a camera if you buy a camera with WiFi, you would have to place it in the garden within range of your router and setup may be a little tricky if you’re not techy. Most cameras use an SD card which you retrieve and insert in the camera or connect the camera to your laptop/tablet via a cable and it is fairly straightforward.
I got a Campark 16MP (they do a few different models) about a year ago and I’ve since got two more, can’t really fault them, most of the features of more expensive cameras but a lot less money. There is a few threads discussing cameras on the forum if you look back a couple of pages
