i cannot download imovie for my MacBook Pro 2011

I have a MacBook Pro from 2011. I cannot download iMovie it just says accept and when I click that nothing happens. I presume my MacBook is too old for it.

I have iMovie for iOS on my iPad Pro 2020 but I want it on my MacBook to use the extra features.

Is there any how I can download iMovie to my MacBook Pro?

Many thanks