In all of these exercises you are given a key in the center and upcoming keys in the bottom right. When starting it is recommended to look in the center although after some practice you should be able to type simply from the bottom right
There are also some other websites listed that could be better for you

• Speed Test: Test your typing speed!
• Home Row: Practice keys exclusively from the home row
• Which Finger?: Helps the brain to understand which finger to use to press each key. Don't move your fingers! (Particulary useful for experienced typists with bad habits)
• Press that key!: You're given a key and you have to press it. A different website with a more real scenario could be more helpful

• keybr.com is helpful because it adapts to your weakest keys, although the words can be a bit strange. It's useful when starting from some typing experience as it'll quickly pick up on the experience you already have and won't teach the basics. This typing trainer won't teach you the home row and all of that stuff, you're just straight into typing. While useful, it can be boring and make sure you don't take a break in the middle of typing something otherwise it'll assume you're terrible at that key
• typingtest.com will lead you through the basics through lots of interactive lessons, although the lessons can fail to adapt to any experience you have gained before
• dancemattyping.com is great if you're 10 years old or don't have the urge to punch your monitor when hearing the words *type on me*