Copy existing websiste

I am happy with my existing website and my clients are very familiar with it. I built it using AppleMac iWeb which soon will no longer be supported on latest software. I therefore need to change the site but as I am not very technical I need something I can easily manage myself. I have heard that WordPress is easy to use although, despite taking an online course, I have not got very far with it! Is it possible to make more or less a clone of the existing site? Some things would need to be changed, eg proper sign up form, proper presentation of videos and other design features that could be improved? My clients like the site and tell me it is easy to navigate so it seems sensible to keep to something similar. I would wish to add a blog page but not as the home page.