The visual editor allows you to edit Wikipedia without using its special mark-up language, instead giving controls that are similiar to a word processor or WYSIWYG editor.
The user page is a Wikipedia page you can create to make a short bio. Your sandbox is where you can practice edits or build pages before they're ready to be put into live Wikipedia.
Check out this guide that focuses on issues specifically related to editing articles about LGBTQ+ people. It discusses issues like deadnaming, outing, and other important ethical considerations.
