GNU/Linux Mint Installing Qt Creator Guide
You are Welcome! The Tutorial shows you Step-by-Step How to Download and Install Qt Creator and Qt SDK Open Source on Mint GNU/Linux Desktops.
By the Way you will Get Installed at Once All the latest Qt for Linux Features including also the Qt Creator and Qt Design Studio.
Especially relevant: with the Current Qt Installer you can choose to Setup for both Qt 5 and Qt 6 App Development.