A lot of people still having trouble to download and install Wizards Unite on their phones. Spetially those who intend to play it with a joystick. The reason for that is the early release.
Not all countrys have been added to the allowed list, so the game might not be avaliable in your location yet. This means that even if you manage to install it, you will not find any creaturers or buildings near by.
If you still want to give it a try, check the website AKP Mirror and search for Wizards Unite. You will find the page with the molst recent .apk release by niantic. All you have to do is download it on your phone and install it.
If the game is avalible in your region, you will find no problems, but if its now, the only way to experience the game for you may be spoofing.
For this particular topic, check out the Pokemong Go Spoofing sub reddit. They have lots of guides on how to setup a joystick for a range of devices.