Sharp GF-3939-how easy to work on?

I have a Sharp Sharp GF-3939 and took a photo of the internals:


How easy would it be to work on?

Would it be easy to replace the belt in the cassette mechanism?

that one looks pretty easy to me

On a scale of 1 to 10, that looks like a 2 in terms of difficulty.

Thanks for your answers-guess it's easy to work on then.