For any serious Bible study, a Bible student needs to know at least some of the basics of the Bible languages involved. There are free lessons available online in both Biblical Hebrew as well as Koine Greek. Please note that, as with a study of all languages, one scholar may disagree with another scholar, and that sometimes the various nuances of a language may be viewed differently by different scholars. One should be aware that scholars and teachers of the Bible languages often state their opinions or generally-accepted opinions of others as though fact.
For more information about Bible Hebrew, see:
For more information about Bible Greek, see:
The pages linked to above also include places online where one can find free lessons in either language.