To stay sane, read only the Draft of XXX Cantos, The Pisan Cantos, and Rock-Drill De Los Cantares. That gives you the best without driving you mad. You need a gloss for the languages you don’t know. They matter. Don’t skip over them. Try to understand the significance of the term Periplum. It is the key to the structure.
I wrote my master’s thesis on Gemstone Imagery in Pound’s Pisan Cantos. It quite nearly killed me.
There is a great deal of marvelous poetry in The Cantos. Enjoy that. The book was never meant to be understood as a finished whole. Indeed, it never was finished. What ever is?