Any suggestions on fixing sills and near tank filler? Also some rear doors wouldn't go astray 😄 I'm in Melbourne but would like to attempt to sort rust and body before going into mechanicals. Interior is very sorted with original radio and books. M130 may need to be replaced or a new head.

Bought her in November from a deceased estate near Geelong. The interior is honestly remarkable - factory radio works, all the books in the glovebox, the dash is uncracked. But the rust is what you see - both sills rotted through, both rear quarters around the tank filler, both rear door bottoms.
The M130 turns over but hasnt been run since 2009. Compression test pending.
I know this is a big ask. Want to do it properly. Where do I start?