New graduates sometimes feel they must reveal every detail about their background and even point out their weaknesses.

Notice how the opening clause in the following example adds nothing to the sentence and in fact totally weakens it:

Although I have not had the opportunity to gain a wide variety of experience in finance, I have gained general experience in my field through internships and stock-trading simulations.

If you simply eliminate that initial negative clause, you strengthen the statement enormously, yet you are still 100 percent honest:

I have gained general experience in my field through internships and stock-trading simulations.