Should I get a doorbell camera?

Hi everyone, I just moved into an old low rise apartment building where there are two entry ways as the building is split in half an 2 apartments per floor (1 front 1 back). I occupy a front unit so I have access to my apartment through the front entry and through the middle.

The front entryway there are 2 doors that lock (open with a key), 1st door to the man area which leads to my stairwell and there’s another door for the first floor neighbour. The stairwell is locked as well. Should I have a ring doorbell camera on this door? I feel like it would only capture my upstairs neighbour lol…

My back door is connected to the main middle stairwell which connects to everyone’s apartments. So sometimes USPS has access to the building to drop off mail, but they usually leave it by the front door anyways. To enter you have to have the key to the middle door. Same with the front door, should I even bother having a camera? Or maybe putting one outside just for my unit?

I am a young female student living mostly alone, my family and boyfriend come and go but don’t live here full time with me. What do you think? Thank you in advance!