Actually, the Summa is theology for beginners.
"Because the doctor of Catholic truth ought not only to teach the proficient, but also to instruct beginners (according to the Apostle: 'As unto little ones in Christ, I gave you milk to drink, not meat' -- 1 Corinthians 3:1-2), we purpose in this book to treat of whatever belongs to the Christian religion, in such a way as may tend to the instruction of beginners."
-- Summa Theologiae, Prologue
I appreciate that interesting quote, but gosh, don’t discourage us! Although Flannery O’Connor had Aquinas as her bedtime reading every night. Maybe with milk and cookies, I could digest the Summa more easily.