I might be a little late to the party here, but try the following links
Tons of magazines you can browse for free, lots of them have projects / type-in's as well as tips and tricks.
https://archive.org/search.php?query=subject%3A"Commodore+Magazine"
https://archive.org/details/computermagazines
And here is a bunch of books, so great, some not so great
https://archive.org/details/commodore_c64_books