Best order to have an overview of Leibniz's philosophical system.

I am studying Leibniz with the Copleston's guide and i am very interested in his logical and metaphisical system. I've read that the main problem with leibniz is the exposition of his thoughts in his writings because he didnt write a "magnum apus" with almost his entire system in the same way that other philosophers did. I'd like to read a few of his writings while im studying him but i don't know wich of them should i pick to start and what path should i follow to read Leibniz works.

Thank you.