The bottom row is below the home row. Your left hand learns Z, X, C, V and B.
The fingers curl slightly downwards: little finger to Z, ring finger to X, middle finger to C, and index finger to V and B. The reach is shorter than the top row, but the angle feels strange at first.
Keep the wrist still. If it bends, the hand loses its place on the home row.
Watch for this: Looking down to find the bottom row. The keys are right under your fingers. Trust them.
Type the practice text above at 15 WPM or faster with 90% accuracy or better. When you reach it, the page tells you and the lessons page puts a tick next to this lesson. If you miss it, try again a little slower. A clean run beats a fast one.
This is lesson 6 of 15. Your progress is saved on this device only.
About ten minutes. Repeat it until you reach the goal. Most people need two or three tries.
Yes. Using each finger for its own keys is what lets you type fast without looking. It feels slower for the first few days.
No. Lesson results stay on this device. Only the normal typing tests can be saved to an account and ranked.