When I bought the handy quadricentennial edition shown in the picture, I was making small talk with the book store clerk about the feasibility of a foreigner making it through the entire set in the original Spanish. He was encouraging, saying that they sold copies in Spanish to foreigners all the time, and that just yesterday they had sold a copy of the very same edition I was buying to Viggo Mortensen*.
I think this may be just the impetus that I need. Knowing that I may be reading it in parallel with Aragorn, son of Arathorn, is quite motivating.
*What he failed to mention was that, according to Wikipedia:
His family moved to Venezuela, Argentina, and Denmark, settling in Argentina, where he learned Spanish and became a fan of Club Atlético San Lorenzo de Almagro. His father managed chicken farms and ranches in Argentina. They remained there until Mortensen was eleven
which gives Viggo a certain advantage, as far as navigating the Spanish is concerned.