How come every time I buy a new item I have to learn an instruction manual or a new app? I’m truly behind!!

Examples:

I got a new Nikon camera ages ago. Can’t use it because I don’t know how.

I bought an electric tooth brush months ago. I’m using it frequently but I know I need to read the manual so I can do it right.

I bought a water pik and I don’t use it because I need to read the instructions.

But today I ran into another similar situation. I bought a bathroom scale. Easy Peasy, right? No!! I have used it once but I don’t think I’m doing everything right. It saves the previous numbers and gives me BMI and lots of other information.

I’m so behind! I must promise myself that I won’t buy anything else with a learning curve! I need to catch up.