the test mode is what you should do first. It is timed and feels like a real test, you can't even go back and forth between questions.
the test mode with skip is timed and feels like a real test, but you can go back and forth between questions. Many real world tests do allow you to go back-and-forth, and if you want that feature, use this mode
Then there's the learning mode - it's for you to do after you do a test, and now want to re-do it for practice. When you start a test in learning mode, a few things happen:
- You can't 'submit' the test - it's only for practice
- The moment you choose an answer, a visual cue will tell you if you got it right or wrong. The intention is you keep trying until you get the answer correctly. Learn the techniques
- There is no time pressure - the clocks will run but it's for you to see how you're doing. You will see a countdown and you will see a question specific timer too.
We've seen many of our members have begun to try the learning mode. It's a good way to go at your pace while learning how to solve the questions correctly. Get the concepts and techniques right, and then try a new test. That's how you would gradually improve.