Despite being a big Arsene Lupin fan, I never actually got into Lupin III, but despite that, the movie is totally enjoyable and beginner friendly I'd say.

The movie manages to combine perfectly the aspects of your usual heist, together that comedy and choreography that only works due to the art style.

Overall it's a great watch if you enjoy movies related to thievery or even if you like Persona 5 (since both borrow form Arsene Lupin) you should watch it.