I cant download the itunes app on my windows

Why, what happens when you try?

iTunes is available from iTunes - Apple. On that page, you can either choose the Microsoft Store version (The Get it from Microsoft button) or, if you scroll down the page to the Looking for other versions? option, where you can select the Windows option to get the version direct from Apple. The differences are minimal.

However, if you have Windows 7 (or Windows 8), that version will not be available to you. Instead, use the following link to a discussion and use either of the links to the Windows 7 version posted by turingtest2: i need to download itunes for Windows 7 P… - Apple Community

For some reason, Apple won't let me post a direct link to Windows 7.