Sadly you need a basic understanding to use them.

The good news is there is plenty of videos to help.

What you are testing matters to what you need.

In general there is just 2 things you will generally be checking

First, power, on a bike it is DC voltage. This measures the power from the battery to your test point.

The second is ohms/resistance. Generally this just tests a wire is connected between the two test points.

Some thing simple like this will cover all your basic needs for a bike.