Prove It! Practice
Two column proofs (along with the other types of proofs) require two things:
1) Familiarity with definitions and theorems
2) Practice drawing conclusions using these
This site provides guided practice for you to build your comfort with the logic based concept. Prove It! provides a significant number of general proofs that range in difficulty level.
My BEST recommendation as a former geometry student who struggled with these and NOW as a geometry math teacher who understands what is involved is to practice.
Good luck!
