Gordon Slocum's suggestions (posted above) are good and you'll find more there than you can consume in a month. Above all, meditate prayerfully on pertinent passages. Memorize them one at a time. (Hopefully you know various Bible memorizing techniques.)amity said:
I'll say this again: mastering the philosophical categories necessary to grasp an explanation of the three-one God is probably not a good way to spend your spare time. Know and believe the Bible. Explanations can wait their turn.