Begin with multiple number of assessments where I stuck at first only because they expect every student to score better than 99% in cognitive aptitude test. I suggest don't even try if you want to stay motivated.

Don't recommend. First step is to take a cognitive aptitude test for which the minimum required is 6/6 stars. It's 50 multiple choice questions in 15 mins which is almost impossible. I got above 30 and was in the 70th percentile (3/6 stars) and was rejected 2 seconds after hitting submit answer for the last question. Don't waste your time.