I have blink cameras up all over the property. Easy to install. Not terribly expensive. The Ring doorbell is awfully nice as well, I'd recommend getting one. You can actually power it with a little solar panel if you are so inclined. The battery lasts for months, so maintenance is low either way.
I found out after the fact that the previous owners of my home are...... shady is a kind description. They left no forwarding address, and everyone from process servers to rental car companies are looking for them, so that security helps me identify those visitors. I do live in a gated community with a guard station, so I usually know who's coming, but sometimes they let people through without my permission.
Sorry for the digression, but anyway, blink or ring are both good options. Easy to use, solid features and both are wireless. As long as you have wifi you are good to go. EDIT: They detect motion and save the clip, along with alerting you of the motion. They can be calibrated to keep false detects to a minimum.