Testing Rigs/Supplies

Hello, im a newbie when it comes to testing and understanding results. Ive been around RCS for a long time but it was always the ready to drive kind. So for someone like me when are some products I should look at getting for testing motors/esc/batteries? For example seeing how much amps my motor is pulling, the RPM., ETC. And if you have had a good experience with a certain product drop a link.