To wonder if I can remove a rectangle extractor fan and replace with a cooker hood with chimney?

[Star1234567890]

Oh wise ones in my phone, is this a straightforward DIY job or would I need a tradesperson?

Would need more of an explanation. Is the extractor fan in the wall? what position is it with reference to the cooker? what's above the cooker at the moment? Things like that but also the cooker hood is an electrical installation so would need an electrician for that.