If you lack language aptitude and are trying to learn, say, Greek, you can still master the language. You might find it encouraging that people like me with very little ability in foreign language acquisition have been able to overcome that handicap. You don't NEED to be really smart at language. Just durable enough to withstand the inevitable setbacks and other obstacles. In that case, sometimes just studying an hour every other day gets the job done. And yes -- a short-term solution is to seek tutorial help from your teacher or pastor. Most will be eager to help!
I know I've mentioned this a thousand times before, but I still get questions about this a lot :)