Is There a Reference Guide to Teach Me the Vocabulary of Apologetics?

Questions about a resource for learning the vocabulary of apologetics, whether to pursue a PhD or another master’s degree, whether to earn a degree in general apologetics or to pick a specific topic to study, and how tactics can be used in written communication.  

• I feel like I need a vocabulary lesson in Christian apologetics just to be able to keep up. Is there a reference guide you could suggest?
• I’m finishing up my MA in apologetics, and I’m not sure whether to pursue a PhD or another master’s degree.
• Do you recommend earning an advanced degree in apologetics or choosing a specific lane (theology, philosophy, science, etc.)?
• How can tactics be used in written communication? Is it possible to use your tactics in a digital written age?