Some libraries also offer digital access to comics. Check if your local library has a subscription to services that include Invincible. Another option could be dedicated comic bookstores that might have physical or digital copies available for purchase or rental.
The Invincible comics don't have nudity. They adhere to a standard of presenting exciting plots and engaging characters without including such elements.
The Invincible comics are finished. There's no more new content coming out in the comic series. But you can still enjoy the existing issues and re-read them for a great experience.