I have a $25 Wize camera magnetically mounted in the window by the door. It is inside and can see the entire front of the house and the driveway all the way to the road. I love it. I access it either online or on my phone. Everything was easy to install and I have never had an issue with the camera. (All issues are with the WIFI since you need that for the camera to be connected to anything. My camera is right at the limit of my WIFI.) It does both video and two-way audio (meaning you can talk with someone through the camera), although where I have it located it is only useful when the window is open. When it is, I can literally talk with anyone at the door, just like a Ring camera.
(I will never forget the time I was on vacation and sitting on the beach back home whilst watching the snow fall in 720P back here in Minnesota. Priceless.)
The downside is the company has been changing since I got this thing and they might be a bit 'proud' of their products now. I have not priced one in a few years. However, there are other options as well. There are very small cameras that are WIFI connectable and are about the size of two Thin Mints. (I know you can understand that size reference. 
) They are also magnetic and can literally attach to your front door if it is metal, or has metal on it. They usually come with brackets for screw and clamp mounting as well.
Try some internet searches for 'small camera' or 'spy camera'. That is how I usually find those kind of things. 
Addendum: Get one for your car as well. Now more than ever, it is vitally important that you follow the teacher's creed: Document, Document, Document! The ones I have mentioned are also useable in that application.
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