To practice, create your own bio page.
If you check the [[Special:Categories|Contents]] you eill will find a category [[Category:People|People]]. Select it and you will see it has a page name <i>Category:People</i>. Remember this.
Now, in the search box at upper right type your name in Camel case Use a middle initial to minimse conflict with similar names. Your name should look like this: JohnADoe. Or, you can use a your full name like JohnAlfredDoe.