Free practice is open typing with no lives, no timer and nothing to lose. Pick one of four difficulties — easy, medium, hard, or the hundred most common English words — and type until you want to stop. Your words-a-minute and accuracy update as you go, and an on-screen keyboard highlights the next key with a hand guide showing which finger it belongs to.
It is the mode to use when you want volume: the surest way to get faster is time spent typing correctly, and this removes every reason to stop. Every run still feeds your key profile, so the practice counts towards knowing which keys are holding you back.
Also try: drills for your weak keys · the structured course