It would be helpful to know what materials you are using in your studies.
One set of books that many people will recommend will be the MGMAT guides
. I think that they are very helpful at teaching fundamentals. Another great resource is the Official Guide, it is the only book with actual GMAT questions. I like to use the MGMAT books
to learn concepts and then test myself on questions from the official guide.
Best of luck.
Give Kudos if my post was helpful!