Welcome to TOL!
Let me suggest a few topics to get you started:
1. the Trinity (vote
here).
2. the full deity and humanity of Christ (see the distinctives
here).
3. the spiritual lostness of the human race (see
here).
4. the substitutionary atonement and bodily resurrection of Christ (on the atonement see
here).
5. salvation by faith alone in Christ alone (see
here).
6. assurance of eternal security of your salvation (on perseverance see
here).
7. the physical return of Christ (see
here).
8. the authority and infallibility of Scripture (see
here).
AMR