It is easy to learn the basics of TeXstudio, for you will easily recognize Sidepanel, Tools, Format, Table, Message-/Log-/Preview-/Terminal-/Search-Pane and the Central toolbar.
After startting TeXstudio, you can see an empty interface listing columns above.
Then by clicking wizard, you can create a first document.
Fill in content might be the easiest yet the most difficult step, because contents are the most import things to orgnize.
After filling, you can compile and preview.
If things works well, congrats on your first trial.