Well I think I will study both eventually.
There are many Hebrew/Aramaic words found translated on a “sound” basis in the NT; so even though the NT is Greek, I think it very useful to know basic Hebrew.
For example, “Beth” means “house” and “lehem” means bread.
So, Jesus was born into the “house of Bread.”
etc.
Also, caution, might be given some mis-information concerning the Greek of the NT. Vs. the Old (LXX), and the inability to read the OT. That’s simply not true. They are both in Koine Greek, and equally readable. The Septuagint predates the time of Jesus, and we have copies from the 400’s.
The Hebrew, however, is not that old. Most of what we have today is past the 1000’s mark. They are both useful for cross-checking each other. Also, note, the Christians have
always used the Greek OT from the time of Christ forward. The re-study of the Hebrew appears to have begun in the 400’s with St. Jerome after Hebrew had basically died as a mainstream Christian language.