How hard is it to learn Flutter?

No it is hard to learn and understand for beginners . First of all learning flutter is second step. First you have to learn dart and understand its syntax. And Dart it is also not easy or good to start for very early beginners.

Best practices

The Ease Compared to its counterparts like React Native, Swift and Java, Flutter is much easier to learn and use . Firstly, setting up Flutter on a Windows, Mac, or Linux machine is a simple process and Google has even bundled Dart with the Flutter installation package so all components are installed at once.