drywall - What do I need to do and repair where these 3M strips

I live in a mature apartment complex, by mature I mean the complex was built in the late '60 early '70s. Only God knows how many actual coats of paint are on the wall(s). This 3M shelf fell one night

Pro tip: use command strips to avoid damaging the paint on your

13 Genius Products for Repairing Walls and Ceilings Yourself - Bob

3M CLAW 45 lbs. Drywall Picture Hanger with Spot Marker 3PH45M-1ES

Command 12 Sets Of Strips Large Sized Picture Hanging Strips White

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Command™ Small Refill Strips

How to Use 3M Command Strips & hang Pictures on your walls without

3M CLAW Drywall Picture Hangers 10-Pack Stainless Steel Hanging

Command™ 20 lb Picture Hanging Strips