Don’t bother. If you like Heinlein read Asimov Robot trilogy: Caves of Steel, Naked Sun, Robots of Dawn. Fun.
I read and enjoyed the Foundation Trilogy and Fantastic Voyage, but I liked Asimov’s short stories the best. ‘The Last Question’ and ‘The Billiard Ball’ were especially memorable, as well as another one (the title escapes me) about a space traveler who chases Jesus from planet to planet, always arriving just a little bit late.