Learn to think through things, not just answer off the top of your head. Get some basic Bible Study tools like concordances, dictionaries, and different versions of the Bible. Get a good computer Bible look up program like Quick Verse for under 40 dollars.
Pray for the Holy Spirit to give you wisdom. Check yourself with others you know are right on in their doctrine so you don't go off on theological tangents that are dangerous.
God bless you as you study. Remember what Timothy says: "Study to show yourself approved." There is no substitute for Bible Study. Stick with it and you can become an apolgist. You could also go to college and get degrees in Bible, but it begins with personal consistent Bible study.